UnmanagedRestorationScope class Null safety

Inserts a provided RestorationBucket into the widget tree and makes it available to descendants via RestorationScope.of.

A restoration scope inserts a RestorationBucket into the widget tree, which descendant widgets can access via RestorationScope.of. It is uncommon for descendants to directly store data in this bucket. Instead, descendant widgets should consider storing their own restoration data in a child bucket claimed with RestorationBucket.claimChild from the bucket provided by this scope.

If bucket is null, no restoration bucket is made available to descendant widgets (RestorationScope.of invoked from a descendant will return null). This effectively turns off state restoration for the subtree because no bucket for storing restoration data is made available.

See also:



UnmanagedRestorationScope({Key? key, RestorationBucket? bucket, required Widget child})
Creates an UnmanagedRestorationScope.


bucket RestorationBucket?
The RestorationBucket that this widget will insert into the widget tree.
child Widget
The widget below this widget in the tree.
final, inherited
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


createElement() InheritedElement
Inflates this configuration to a concrete instance.
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
toStringShort() String
A short, textual description of this widget.
updateShouldNotify(covariant UnmanagedRestorationScope oldWidget) bool
Whether the framework should notify widgets that inherit from this widget.


operator ==(Object other) bool
The equality operator.
@nonVirtual, inherited