adoptChild method

void adoptChild(RenderObject child)

Add a child to this render object

Implementation

void adoptChild(RenderObject child) {
  assert(
    child.parent == null,
    'Child ${child.runtimeType} already has parent '
    '${child.parent.runtimeType}',
  );
  child.parent = this;
  children.add(child);
  final owner = _pipelineOwner;
  if (owner != null) {
    child.attach(owner);
  }
  markNeedsLayout();
}