graph,graph/{encoding/dot,internal/set,topo,traverse}: remove intsets imports

graph/internal/set/same_appengine.go

@@ -16,3 +16,12 @@ import "reflect"
 func same(a, b Nodes) bool {
 	return reflect.ValueOf(a).Pointer() == reflect.ValueOf(b).Pointer()
 }
+
+// intsSame determines whether two sets are backed by the same store. In the
+// current implementation using hash maps it makes use of the fact that
+// hash maps are passed as a pointer to a runtime Hmap struct. A map is
+// not seen by the runtime as a pointer though, so we use reflect to get
+// the maps' pointer values to compare.
+func intsSame(a, b Ints) bool {
+	return reflect.ValueOf(a).Pointer() == reflect.ValueOf(b).Pointer()
+}