- override
Called by subclasses when they decide a render object is no longer 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.
Source
@override
void dropChild(RenderObject child) {
assert(_debugCanPerformMutations);
assert(child != null);
assert(child.parentData != null);
child._cleanRelayoutBoundary();
child.parentData.detach();
child.parentData = null;
super.dropChild(child);
markNeedsLayout();
markNeedsCompositingBitsUpdate();
}