adoptChild method

@override void adoptChild(RenderObject child)

Called by subclasses when they decide a render object is a child.

Only for use by subclasses when changing their child lists. Calling this in other cases will lead to an inconsistent tree and probably cause crashes.

Implementation

@override
void adoptChild(RenderObject child) {
  super.adoptChild(child);
  _firstSortedChild = null;
  _lastSortedChild = null;
}