dropChild method

  1. @protected
  2. @mustCallSuper
void dropChild (covariant AbstractNode child)
@mustCallSuper, @protected

Disconnect the given node from this node.

Subclasses should call this function when they lose a child.

Implementation 

@protected
@mustCallSuper
void dropChild(covariant AbstractNode child) {
  assert(child != null);
  assert(child._parent == this);
  assert(child.attached == attached);
  child._parent = null;
  if (attached)
    child.detach();
}