diff --git a/datastructure/optional/optional.go b/datastructure/optional/optional.go
index ab6d62d..663c660 100644
--- a/datastructure/optional/optional.go
+++ b/datastructure/optional/optional.go
@@ -10,8 +10,8 @@ type Optional[T any] struct {
 	mu    *sync.RWMutex
 }
 
-// Empty returns an empty Optional instance.
-func Empty[T any]() Optional[T] {
+// Default returns an default Optional instance.
+func Default[T any]() Optional[T] {
 	return Optional[T]{mu: &sync.RWMutex{}}
 }
 
@@ -20,29 +20,29 @@ func Of[T any](value T) Optional[T] {
 	return Optional[T]{value: &value, mu: &sync.RWMutex{}}
 }
 
-// OfNullable returns an Optional for a given value, which may be nil.
-func OfNullable[T any](value *T) Optional[T] {
+// FromNillable returns an Optional for a given value, which may be nil.
+func FromNillable[T any](value *T) Optional[T] {
 	if value == nil {
-		return Empty[T]()
+		return Default[T]()
 	}
 	return Optional[T]{value: value, mu: &sync.RWMutex{}}
 }
 
-// IsPresent checks if there is a value present.
-func (o Optional[T]) IsPresent() bool {
+// IsNotNil checks if there is a value present.
+func (o Optional[T]) IsNotNil() bool {
 	o.mu.RLock()
 	defer o.mu.RUnlock()
 
 	return o.value != nil
 }
 
-// IsEmpty checks if the Optional is empty.
-func (o Optional[T]) IsEmpty() bool {
-	return !o.IsPresent()
+// IsNil checks if the Optional is nil.
+func (o Optional[T]) IsNil() bool {
+	return !o.IsNotNil()
 }
 
-// IfPresent performs the given action with the value if a value is present.
-func (o Optional[T]) IfPresent(action func(value T)) {
+// IfNotNil performs the given action with the value if a value is not nil.
+func (o Optional[T]) IfNotNil(action func(value T)) {
 	o.mu.RLock()
 	defer o.mu.RUnlock()
 
@@ -51,20 +51,20 @@ func (o Optional[T]) IfPresent(action func(value T)) {
 	}
 }
 
-// IfPresentOrElse performs the action with the value if present, otherwise performs the empty-based action.
-func (o Optional[T]) IfPresentOrElse(action func(value T), emptyAction func()) {
+// IfNotNilOrElse performs the action with the value if present, otherwise performs the fallback action.
+func (o Optional[T]) IfNotNilOrElse(action func(value T), fallbackAction func()) {
 	o.mu.RLock()
 	defer o.mu.RUnlock()
 
 	if o.value != nil {
 		action(*o.value)
 	} else {
-		emptyAction()
+		fallbackAction()
 	}
 }
 
-// Get returns the value if present, otherwise panics.
-func (o Optional[T]) Get() T {
+// Unwarp returns the value if not nil, otherwise panics.
+func (o Optional[T]) Unwarp() T {
 	o.mu.RLock()
 	defer o.mu.RUnlock()
 
@@ -74,7 +74,7 @@ func (o Optional[T]) Get() T {
 	return *o.value
 }
 
-// OrElse returns the value if present, otherwise returns other.
+// OrElse returns the value if is not nil, otherwise returns other.
 func (o Optional[T]) OrElse(other T) T {
 	o.mu.RLock()
 	defer o.mu.RUnlock()
@@ -85,24 +85,24 @@ func (o Optional[T]) OrElse(other T) T {
 	return other
 }
 
-// OrElseGet returns the value if present, otherwise invokes supplier and returns the result.
-func (o Optional[T]) OrElseGet(supplier func() T) T {
+// OrElseGet returns the value if is not nil, otherwise invokes action and returns the result.
+func (o Optional[T]) OrElseGet(action func() T) T {
 	o.mu.RLock()
 	defer o.mu.RUnlock()
 
 	if o.value != nil {
 		return *o.value
 	}
-	return supplier()
+	return action()
 }
 
-// OrElseThrow returns the value if present, otherwise returns an error.
-func (o Optional[T]) OrElseThrow(errorSupplier func() error) (T, error) {
+// OrElseTrigger returns the value if present, otherwise returns an error.
+func (o Optional[T]) OrElseTrigger(errorHandler func() error) (T, error) {
 	o.mu.RLock()
 	defer o.mu.RUnlock()
 
 	if o.value == nil {
-		return *new(T), errorSupplier()
+		return *new(T), errorHandler()
 	}
 	return *o.value, nil
 }
diff --git a/datastructure/optional/optional_test.go b/datastructure/optional/optional_test.go
index 0851887..461b4e3 100644
--- a/datastructure/optional/optional_test.go
+++ b/datastructure/optional/optional_test.go
@@ -7,11 +7,11 @@ import (
 	"github.com/duke-git/lancet/v2/internal"
 )
 
-func TestEmpty(t *testing.T) {
+func TestDefault(t *testing.T) {
 	assert := internal.NewAssert(t, "TestEmpty")
-	opt := Empty[int]()
+	opt := Default[int]()
 
-	assert.ShouldBeTrue(opt.IsEmpty())
+	assert.ShouldBeTrue(opt.IsNil())
 }
 
 func TestOf(t *testing.T) {
@@ -19,30 +19,30 @@ func TestOf(t *testing.T) {
 	value := 42
 	opt := Of(value)
 
-	assert.ShouldBeTrue(opt.IsPresent())
-	assert.Equal(opt.Get(), value)
+	assert.ShouldBeTrue(opt.IsNotNil())
+	assert.Equal(opt.Unwarp(), value)
 }
 
-func TestOfNullable(t *testing.T) {
+func TestFromNillable(t *testing.T) {
 	assert := internal.NewAssert(t, "TestOfNullable")
 	var value *int = nil
-	opt := OfNullable(value)
+	opt := FromNillable(value)
 
-	assert.ShouldBeFalse(opt.IsPresent())
+	assert.ShouldBeFalse(opt.IsNotNil())
 
 	value = new(int)
 	*value = 42
-	opt = OfNullable(value)
+	opt = FromNillable(value)
 
-	assert.ShouldBeTrue(opt.IsPresent())
+	assert.ShouldBeTrue(opt.IsNotNil())
 }
 
 func TestOrElse(t *testing.T) {
 	assert := internal.NewAssert(t, "TestOrElse")
-	optEmpty := Empty[int]()
+	optDefault := Default[int]()
 	defaultValue := 100
 
-	val := optEmpty.OrElse(defaultValue)
+	val := optDefault.OrElse(defaultValue)
 	assert.Equal(val, defaultValue)
 
 	optWithValue := Of(42)
@@ -53,72 +53,72 @@ func TestOrElse(t *testing.T) {
 func TestOrElseGetHappyPath(t *testing.T) {
 	assert := internal.NewAssert(t, "TestOrElseGetHappyPath")
 	optWithValue := Of(42)
-	supplier := func() int { return 100 }
+	action := func() int { return 100 }
 
-	val := optWithValue.OrElseGet(supplier)
+	val := optWithValue.OrElseGet(action)
 	assert.Equal(val, 42)
 }
 
 func TestOrElseGet(t *testing.T) {
 	assert := internal.NewAssert(t, "TestOrElseGet")
-	optEmpty := Empty[int]()
-	supplier := func() int { return 100 }
+	optDefault := Default[int]()
+	action := func() int { return 100 }
 
-	val := optEmpty.OrElseGet(supplier)
-	assert.Equal(val, supplier())
+	val := optDefault.OrElseGet(action)
+	assert.Equal(val, action())
 }
 
-func TestOrElseThrow(t *testing.T) {
-	assert := internal.NewAssert(t, "TestOrElseThrow")
-	optEmpty := Empty[int]()
-	_, err := optEmpty.OrElseThrow(func() error { return errors.New("no value") })
+func TestOrElseTrigger(t *testing.T) {
+	assert := internal.NewAssert(t, "OrElseTrigger")
+	optDefault := Default[int]()
+	_, err := optDefault.OrElseTrigger(func() error { return errors.New("no value") })
 
 	assert.Equal(err.Error(), "no value")
 
 	optWithValue := Of(42)
-	val, err := optWithValue.OrElseThrow(func() error { return errors.New("no value") })
+	val, err := optWithValue.OrElseTrigger(func() error { return errors.New("no value") })
 
 	assert.IsNil(err)
 	assert.Equal(val, 42)
 }
 
-func TestIfPresent(t *testing.T) {
-	assert := internal.NewAssert(t, "TestIfPresent")
+func TestIfNotNil(t *testing.T) {
+	assert := internal.NewAssert(t, "IfNotNil")
 	called := false
 	action := func(value int) { called = true }
 
-	optEmpty := Empty[int]()
-	optEmpty.IfPresent(action)
+	optDefault := Default[int]()
+	optDefault.IfNotNil(action)
 
 	assert.ShouldBeFalse(called)
 
 	called = false // Reset for next test
 	optWithValue := Of(42)
-	optWithValue.IfPresent(action)
+	optWithValue.IfNotNil(action)
 
 	assert.ShouldBeTrue(called)
 }
 
-func TestIfPresentOrElse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestIfPresentOrElse")
+func TestIfNotNilOrElse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIfNotNilOrElse")
 
 	// Test when value is present
 	calledWithValue := false
 	valueAction := func(value int) { calledWithValue = true }
-	emptyAction := func() { t.Errorf("Empty action should not be called when value is present") }
+	fallbackAction := func() { t.Errorf("Empty action should not be called when value is present") }
 
 	optWithValue := Of(42)
-	optWithValue.IfPresentOrElse(valueAction, emptyAction)
+	optWithValue.IfNotNilOrElse(valueAction, fallbackAction)
 
 	assert.ShouldBeTrue(calledWithValue)
 
 	// Test when value is not present
 	calledWithEmpty := false
 	valueAction = func(value int) { t.Errorf("Value action should not be called when value is not present") }
-	emptyAction = func() { calledWithEmpty = true }
+	fallbackAction = func() { calledWithEmpty = true }
 
-	optEmpty := Empty[int]()
-	optEmpty.IfPresentOrElse(valueAction, emptyAction)
+	optDefault := Default[int]()
+	optDefault.IfNotNilOrElse(valueAction, fallbackAction)
 
 	assert.ShouldBeTrue(calledWithEmpty)
 }
@@ -133,19 +133,19 @@ func TestGetWithPanicStandard(t *testing.T) {
 			r := recover()
 			assert.IsNil(r)
 		}()
-		val := optWithValue.Get()
+		val := optWithValue.Unwarp()
 		if val != 42 {
-			t.Errorf("Expected Get to return 42, got %v", val)
+			t.Errorf("Expected Unwarp to return 42, got %v", val)
 		}
 	}()
 
 	// Test when value is not present
-	optEmpty := Empty[int]()
+	optDefault := Default[int]()
 	func() {
 		defer func() {
 			r := recover()
 			assert.IsNotNil(r)
 		}()
-		_ = optEmpty.Get()
+		_ = optDefault.Unwarp()
 	}()
 }
diff --git a/docs/api/packages/datastructure/optional.md b/docs/api/packages/datastructure/optional.md
index 303823d..ad7e283 100644
--- a/docs/api/packages/datastructure/optional.md
+++ b/docs/api/packages/datastructure/optional.md
@@ -22,17 +22,16 @@ import (
 ## 目录
 
 - [Of](#Of)
-- [OfNullable](#OfNullable)
-- [Empty](#Empty)
-- [IsPresent](#IsPresent)
-- [IsEmpty](#IsEmpty)
-- [IfPresent](#IfPresent)
-- [IfPresentOrElse](#IfPresentOrElse)
-- [Get](#Get)
+- [FromNillable](#FromNillable)
+- [Default](#Default)
+- [IsNotNil](#IsNotNil)
+- [IsNil](#IsNil)
+- [IsNotNil](#IsNotNil)
+- [IfNotNilOrElse](#IfPresentOrElse)
+- [Umwarp](#Umwarp)
 - [OrElse](#OrElse)
 - [OrElseGet](#OrElseGet)
-- [OrElseThrow](#OrElseThrow)
-
+- [OrElseTrigger](#OrElseTrigger)
 
 
 <div STYLE="page-break-after: always;"></div>
@@ -68,14 +67,13 @@ func main() {
 }
 ```
 
-### <span id="OfNullable">OfNullable</span>
-
+### <span id="FromNillable">FromNillable</span>
 <p>返回一个包含给定值的Optional，该值可能为空 (nil)。</p>
 
 <b>函数签名:</b>
 
 ```go
-func OfNullable[T any](value *T) Optional[T]
+func FromNillable[T any](value *T) Optional[T]
 ```
 <b>示例:</b>
 
@@ -89,15 +87,15 @@ import (
 
 func main() {
     var value *int = nil
-    opt := optional.OfNullable(value)
+    opt := optional.FromNillable(value)
 
-    fmt.Println(opt.IsPresent())
+    fmt.Println(opt.IsNotNil())
 
     value = new(int)
     *value = 42
-    opt = optional.OfNullable(value)
+    opt = optional.FromNillable(value)
 
-    fmt.Println(opt.IsPresent())
+    fmt.Println(opt.IsNotNil())
 
 
     // Output:
@@ -107,14 +105,13 @@ func main() {
 ```
 
 
-### <span id="Empty">Empty</span>
-
+### <span id="Default">Default</span>
 <p>返回一个空Optional实例。</p>
 
 <b>函数签名:</b>
 
 ```go
-func Empty[T any]() Optional[T]
+func Default[T any]() Optional[T]
 ```
 <b>示例:</b>
 
@@ -127,8 +124,8 @@ import (
 )
 
 func main() {
-    optEmpty := OfNullable.Empty[int]()
-    fmt.Println(optEmpty.IsEmpty())
+    optDefault := optional.Default[int]()
+    fmt.Println(optDefault.IsNil())
 
     // Output:
     // true
@@ -136,14 +133,13 @@ func main() {
 ```
 
 
-### <span id="IsEmpty">IsEmpty</span>
-
+### <span id="IsNil">IsNil</span>
 <p>验证Optional是否为空。</p>
 
 <b>函数签名:</b>
 
 ```go
-func (o Optional[T]) IsEmpty() bool
+func (o Optional[T]) IsNil() bool
 ```
 <b>示例:</b>
 
@@ -156,23 +152,21 @@ import (
 )
 
 func main() {
-    optEmpty := OfNullable.Empty[int]()
-    fmt.Println(optEmpty.IsEmpty())
+    optDefault := optional.Default[int]()
+    fmt.Println(optDefault.IsNil())
 
     // Output:
     // true
 }
 ```
 
-
-### <span id="IsPresent">IsPresent</span>
-
+### <span id="IsNotNil">IsNotNil</span>
 <p>检查当前Optional内是否存在值。</p>
 
 <b>函数签名:</b>
 
 ```go
-func (o Optional[T]) IsPresent() bool
+func (o Optional[T]) IsNotNil() bool
 ```
 <b>示例:</b>
 
@@ -181,20 +175,20 @@ package main
 
 import (
     "fmt"
-    optional "github.com/duke-git/lancet/v2/datastructure/optional"
+    "github.com/duke-git/lancet/v2/datastructure/optional"
 )
 
 func main() {
     var value *int = nil
-    opt := optional.OfNullable(value)
+    opt := optional.FromNillable(value)
 
-    fmt.Println(opt.IsPresent())
+    fmt.Println(opt.IsNotNil())
 
     value = new(int)
     *value = 42
-    opt = optional.OfNullable(value)
+    opt = optional.FromNillable(value)
 
-    fmt.Println(opt.IsPresent())
+    fmt.Println(opt.IsNotNil())
 
 
     // Output:
@@ -203,15 +197,13 @@ func main() {
 }
 ```
 
-
-### <span id="IfPresent">IfPresent</span>
-
+### <span id="IfNotNil">IfNotNil</span>
 <p>如果值存在，则使用action方法执行给定的操作。</p>
 
 <b>函数签名:</b>
 
 ```go
-func (o Optional[T]) IfPresent(action func(value T))
+func (o Optional[T]) IfNotNil(action func(value T))
 ```
 <b>示例:</b>
 
@@ -220,23 +212,23 @@ package main
 
 import (
     "fmt"
-    optional "github.com/duke-git/lancet/v2/datastructure/optional"
+     "github.com/duke-git/lancet/v2/datastructure/optional"
 )
 
 func main() {
     called := false
     action := func(value int) { called = true }
 
-    optEmpty := optional.Empty[int]()
-    optEmpty.IfPresent(action)
+    optDefault := optional.Default[int]()
+    optDefault.IfNotNil(action)
 
     fmt.Println(called)
 
     called = false // Reset for next test
     optWithValue := optional.Of(42)
-    optWithValue.IfPresent(action)
+    optWithValue.IfNotNil(action)
 
-    fmt.Println(optWithValue.IsPresent())
+    fmt.Println(optWithValue.IsNotNil())
 
     // Output:
     // false
@@ -245,14 +237,13 @@ func main() {
 ```
 
 
-### <span id="IfPresentOrElse">IfPresentOrElse</span>
-
+### <span id="IfNotNilOrElse">IfNotNilOrElse</span>
 <p>根据是否存在值执行相应的操作：有值则执行指定操作，没有值则执行默认操作。</p>
 
 <b>函数签名:</b>
 
 ```go
-func (o Optional[T]) IfPresentOrElse(action func(value T), emptyAction func())
+func (o Optional[T]) IfNotNilOrElse(action func(value T), fallbackAction func())
 ```
 <b>示例:</b>
 
@@ -270,7 +261,7 @@ func main() {
     emptyAction := func() { t.Errorf("Empty action should not be called when value is present") }
 
     optWithValue := optional.Of(42)
-    optWithValue.IfPresentOrElse(valueAction, emptyAction)
+    optWithValue.IfNotNilOrElse(valueAction, emptyAction)
 
     fmt.Println(calledWithValue)
 
@@ -278,8 +269,8 @@ func main() {
     valueAction = func(value int) { t.Errorf("Value action should not be called when value is not present") }
     emptyAction = func() { calledWithEmpty = true }
 
-    optEmpty := optional.Empty[int]()
-    optEmpty.IfPresentOrElse(valueAction, emptyAction)
+    optDefault := optional.Default[int]()
+    optDefault.IfNotNilOrElse(valueAction, emptyAction)
 
     fmt.Println(calledWithEmpty)
 
@@ -289,13 +280,13 @@ func main() {
 }
 ```
 
-### <span id="Get">Get</span>
+### <span id="Unwrap">Unwrap</span>
 <p>如果存在，返回该值，否则引发panic。</p>
 
 <b>函数签名:</b>
 
 ```go
-func (o Optional[T]) Get() T
+func (o Optional[T]) Unwrap() T
 ```
 <b>示例:</b>
 
@@ -311,7 +302,7 @@ func main() {
     value := 42
     opt := optional.Of(value)
 
-    fmt.Println(opt.Get())
+    fmt.Println(opt.Unwrap())
 
     // Output:
     // 42
@@ -338,8 +329,8 @@ import (
 )
 
 func main() {
-    optEmpty := optional.Empty[int]()
-    val := optEmpty.OrElse(100)
+    optDefault := optional.Empty[int]()
+    val := optDefault.OrElse(100)
     fmt.Println(val)
 
     optWithValue := optional.Of(42)
@@ -359,7 +350,7 @@ func main() {
 <b>函数签名:</b>
 
 ```go
-func (o Optional[T]) OrElseGet(supplier func() T) T
+func (o Optional[T]) OrElseGet(action func() T) T
 ```
 <b>示例:</b>
 
@@ -372,10 +363,10 @@ import (
 )
 
 func main() {
-    optEmpty := optional.Empty[int]()
-    supplier := func() int { return 100 }
+    optDefault := optional.Default[int]()
+    action := func() int { return 100 }
 
-    val := optEmpty.OrElseGet(supplier)
+    val := optDefault.OrElseGet(action)
     fmt.Println(val)
 
     // Output:
@@ -383,14 +374,13 @@ func main() {
 }
 ```
 
-
-### <span id="OrElseThrow">OrElseThrow</span>
+### <span id="OrElseTrigger">OrElseTrigger</span>
 <p>检查Optional值是否存在，如果存在，则直接返回该值，否则返回错误。</p>
 
 <b>函数签名:</b>
 
 ```go
-func (o Optional[T]) OrElseThrow(errorSupplier func() error) (T, error)
+ OrElseTrigger(errorHandler func() error) (T, error)
 ```
 <b>示例:</b>
 
@@ -403,13 +393,13 @@ import (
 )
 
 func main() {
-    optEmpty := optional.Empty[int]()
-    _, err := optEmpty.OrElseThrow(func() error { return errors.New("no value") })
+    optDefault := optional.Default[int]()
+    _, err := optDefault.OrElseTrigger(func() error { return errors.New("no value") })
     
     fmt.Println(err.Error())
 
     optWithValue := optional.Of(42)
-    val, err := optWithValue.OrElseThrow(func() error { return errors.New("no value") })
+    val, err := optWithValue.OrElseTrigger(func() error { return errors.New("no value") })
 
     fmt.Println(val)
     fmt.Println(err)
diff --git a/docs/en/api/packages/datastructure/optional.md b/docs/en/api/packages/datastructure/optional.md
index 15ad422..6554c64 100644
--- a/docs/en/api/packages/datastructure/optional.md
+++ b/docs/en/api/packages/datastructure/optional.md
@@ -22,16 +22,16 @@ import (
 ## Index
 
 - [Of](#Of)
-- [OfNullable](#OfNullable)
-- [Empty](#Empty)
-- [IsPresent](#IsPresent)
-- [IsEmpty](#IsEmpty)
-- [IfPresent](#IfPresent)
-- [IfPresentOrElse](#IfPresentOrElse)
-- [Get](#Get)
+- [FromNillable](#FromNillable)
+- [Default](#Default)
+- [IsNotNil](#IsNotNil)
+- [IsNil](#IsNil)
+- [IsNotNil](#IsNotNil)
+- [IfNotNilOrElse](#IfPresentOrElse)
+- [Umwarp](#Umwarp)
 - [OrElse](#OrElse)
 - [OrElseGet](#OrElseGet)
-- [OrElseThrow](#OrElseThrow)
+- [OrElseTrigger](#OrElseTrigger)
 
 
 
@@ -68,13 +68,13 @@ func main() {
 }
 ```
 
-### <span id="OfNullable">OfNullable</span>
+### <span id="FromNillable">FromNillable</span>
 <p>Returns an Optional for a given value, which may be nil.</p>
 
 <b>Signature:</b>
 
 ```go
-func OfNullable[T any](value *T) Optional[T]
+func FromNillable[T any](value *T) Optional[T]
 ```
 <b>Example:</b>
 
@@ -88,15 +88,15 @@ import (
 
 func main() {
     var value *int = nil
-    opt := optional.OfNullable(value)
+    opt := optional.FromNillable(value)
 
-    fmt.Println(opt.IsPresent())
+    fmt.Println(opt.IsNotNil())
 
     value = new(int)
     *value = 42
-    opt = optional.OfNullable(value)
+    opt = optional.FromNillable(value)
 
-    fmt.Println(opt.IsPresent())
+    fmt.Println(opt.IsNotNil())
 
 
     // Output:
@@ -106,13 +106,13 @@ func main() {
 ```
 
 
-### <span id="Empty">Empty</span>
-<p>Returns an empty Optional instance.</p>
+### <span id="Default">Default</span>
+<p>Returns an default Optional instance.</p>
 
 <b>Signature:</b>
 
 ```go
-func Empty[T any]() Optional[T]
+func Default[T any]() Optional[T]
 ```
 <b>Example:</b>
 
@@ -125,8 +125,8 @@ import (
 )
 
 func main() {
-    optEmpty := OfNullable.Empty[int]()
-    fmt.Println(optEmpty.IsEmpty())
+    optDefault := optional.Default[int]()
+    fmt.Println(optDefault.IsNil())
 
     // Output:
     // true
@@ -134,13 +134,13 @@ func main() {
 ```
 
 
-### <span id="IsEmpty">IsEmpty</span>
-<p>Checks if the Optional is empty.</p>
+### <span id="IsNil">IsNil</span>
+<p>Checks if the Optional is nil.</p>
 
 <b>Signature:</b>
 
 ```go
-func (o Optional[T]) IsEmpty() bool
+func (o Optional[T]) IsNil() bool
 ```
 <b>Example:</b>
 
@@ -153,8 +153,8 @@ import (
 )
 
 func main() {
-    optEmpty := OfNullable.Empty[int]()
-    fmt.Println(optEmpty.IsEmpty())
+    optDefault := optional.Default[int]()
+    fmt.Println(optDefault.IsNil())
 
     // Output:
     // true
@@ -162,13 +162,13 @@ func main() {
 ```
 
 
-### <span id="IsPresent">IsPresent</span>
-<p>Checks if there is a value present.</p>
+### <span id="IsNotNil">IsNotNil</span>
+<p>Checks if there is a value not nil.</p>
 
 <b>Signature:</b>
 
 ```go
-func (o Optional[T]) IsPresent() bool
+func (o Optional[T]) IsNotNil() bool
 ```
 <b>Example:</b>
 
@@ -182,15 +182,15 @@ import (
 
 func main() {
     var value *int = nil
-    opt := optional.OfNullable(value)
+    opt := optional.FromNillable(value)
 
-    fmt.Println(opt.IsPresent())
+    fmt.Println(opt.IsNotNil())
 
     value = new(int)
     *value = 42
-    opt = optional.OfNullable(value)
+    opt = optional.FromNillable(value)
 
-    fmt.Println(opt.IsPresent())
+    fmt.Println(opt.IsNotNil())
 
 
     // Output:
@@ -200,13 +200,13 @@ func main() {
 ```
 
 
-### <span id="IfPresent">IfPresent</span>
+### <span id="IfNotNil">IfNotNil</span>
 <p>Performs the given action with the value if a value is present.</p>
 
 <b>Signature:</b>
 
 ```go
-func (o Optional[T]) IfPresent(action func(value T))
+func (o Optional[T]) IfNotNil(action func(value T))
 ```
 <b>Example:</b>
 
@@ -222,16 +222,16 @@ func main() {
     called := false
     action := func(value int) { called = true }
 
-    optEmpty := optional.Empty[int]()
-    optEmpty.IfPresent(action)
+    optDefault := optional.Default[int]()
+    optDefault.IfNotNil(action)
 
     fmt.Println(called)
 
     called = false // Reset for next test
     optWithValue := optional.Of(42)
-    optWithValue.IfPresent(action)
+    optWithValue.IfNotNil(action)
 
-    fmt.Println(optWithValue.IsPresent())
+    fmt.Println(optWithValue.IsNotNil())
 
     // Output:
     // false
@@ -240,13 +240,13 @@ func main() {
 ```
 
 
-### <span id="IfPresentOrElse">IfPresentOrElse</span>
-<p>Performs the action with the value if present, otherwise performs the empty-based action.</p>
+### <span id="IfNotNilOrElse">IfNotNilOrElse</span>
+<p>Performs the action with the value if not nil, otherwise performs the fallback action.</p>
 
 <b>Signature:</b>
 
 ```go
-func (o Optional[T]) IfPresentOrElse(action func(value T), emptyAction func())
+func (o Optional[T]) IfNotNilOrElse(action func(value T), fallbackAction func())
 ```
 <b>Example:</b>
 
@@ -264,7 +264,7 @@ func main() {
     emptyAction := func() { t.Errorf("Empty action should not be called when value is present") }
 
     optWithValue := optional.Of(42)
-    optWithValue.IfPresentOrElse(valueAction, emptyAction)
+    optWithValue.IfNotNilOrElse(valueAction, emptyAction)
 
     fmt.Println(calledWithValue)
 
@@ -272,8 +272,8 @@ func main() {
     valueAction = func(value int) { t.Errorf("Value action should not be called when value is not present") }
     emptyAction = func() { calledWithEmpty = true }
 
-    optEmpty := optional.Empty[int]()
-    optEmpty.IfPresentOrElse(valueAction, emptyAction)
+    optDefault := optional.Default[int]()
+    optDefault.IfNotNilOrElse(valueAction, emptyAction)
 
     fmt.Println(calledWithEmpty)
 
@@ -283,13 +283,13 @@ func main() {
 }
 ```
 
-### <span id="Get">Get</span>
-<p>Returns the value if present, otherwise panics.</p>
+### <span id="Unwrap">Unwrap</span>
+<p>Returns the value if not nil, otherwise panics.</p>
 
 <b>Signature:</b>
 
 ```go
-func (o Optional[T]) Get() T
+func (o Optional[T]) Unwrap() T
 ```
 <b>Example:</b>
 
@@ -305,7 +305,7 @@ func main() {
     value := 42
     opt := optional.Of(value)
 
-    fmt.Println(opt.Get())
+    fmt.Println(opt.Unwrap())
 
     // Output:
     // 42
@@ -314,7 +314,7 @@ func main() {
 
 
 ### <span id="OrElse">OrElse</span>
-<p>Returns the value if present, otherwise returns other.</p>
+<p>Returns the value if not nill, otherwise returns other.</p>
 
 <b>Signature:</b>
 
@@ -332,8 +332,8 @@ import (
 )
 
 func main() {
-    optEmpty := optional.Empty[int]()
-    val := optEmpty.OrElse(100)
+    optDefault := optional.Default[int]()
+    val := optDefault.OrElse(100)
     fmt.Println(val)
 
     optWithValue := optional.Of(42)
@@ -348,12 +348,12 @@ func main() {
 
 
 ### <span id="OrElseGet">OrElseGet</span>
-<p>Returns the value if present, otherwise invokes supplier and returns the result.</p>
+<p>Returns the value if not nil, otherwise invokes action and returns the result.</p>
 
 <b>Signature:</b>
 
 ```go
-func (o Optional[T]) OrElseGet(supplier func() T) T
+func (o Optional[T]) OrElseGet(action func() T) T
 ```
 <b>Example:</b>
 
@@ -366,10 +366,10 @@ import (
 )
 
 func main() {
-    optEmpty := optional.Empty[int]()
-    supplier := func() int { return 100 }
+    optDefault := optional.Default[int]()
+    action := func() int { return 100 }
 
-    val := optEmpty.OrElseGet(supplier)
+    val := optDefault.OrElseGet(action)
     fmt.Println(val)
 
     // Output:
@@ -378,13 +378,13 @@ func main() {
 ```
 
 
-### <span id="OrElseThrow">OrElseThrow</span>
+### <span id="OrElseTrigger">OrElseTrigger</span>
 <p>Returns the value if present, otherwise returns an error.</p>
 
 <b>Signature:</b>
 
 ```go
-func (o Optional[T]) OrElseThrow(errorSupplier func() error) (T, error)
+ OrElseTrigger(errorHandler func() error) (T, error)
 ```
 <b>Example:</b>
 
@@ -397,13 +397,13 @@ import (
 )
 
 func main() {
-    optEmpty := optional.Empty[int]()
-    _, err := optEmpty.OrElseThrow(func() error { return errors.New("no value") })
+    optDefault := optional.Default[int]()
+    _, err := optDefault.OrElseTrigger(func() error { return errors.New("no value") })
     
     fmt.Println(err.Error())
 
     optWithValue := optional.Of(42)
-    val, err := optWithValue.OrElseThrow(func() error { return errors.New("no value") })
+    val, err := optWithValue.OrElseTrigger(func() error { return errors.New("no value") })
 
     fmt.Println(val)
     fmt.Println(err)