didUnmountRenderObject method Null safety

  1. @override
void didUnmountRenderObject(
  1. covariant RenderObject renderObject
)
override

A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.

Implementation

@override
void didUnmountRenderObject(RenderObject renderObject) {
  assert(renderObject == renderBox);
  onUnmount?.call();
}