detach method

@override void detach()

Mark this render object as detached from its PipelineOwner.

Typically called only from the parent's detach, and by the owner to mark the root of a tree as detached.

Subclasses with children should override this method to detach all their children after calling the inherited method, as in super.detach().

Implementation

@override
void detach() {
  delegate._relayout?.removeListener(markNeedsLayout);
  delegate._repaint?.removeListener(markNeedsPaint);
  super.detach();
}