didUnmountRenderObject method
- covariant RenderCustomPaint renderObject
override
A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.
Implementation
@override
void didUnmountRenderObject(RenderCustomPaint renderObject) {
renderObject
..painter = null
..foregroundPainter = null;
}