moveChildRenderObject method

  1. @override
void moveChildRenderObject (covariant RenderObject child, covariant dynamic slot)
override

Move the given child to the given slot.

The given child is guaranteed to have renderObject as its parent.

The semantics of slot are determined by this element. For example, if this element has a single child, the slot should always be null. If this element has a list of children, the previous sibling is a convenient value for the slot.

Implementation 

@override
void moveChildRenderObject(RenderObject child, dynamic slot) {
  const String moveChildRenderObjectErrorMessage =
      'Currently we maintain the list in contiguous increasing order, so '
      'moving children around is not allowed.';
  assert(false, moveChildRenderObjectErrorMessage);
}