updateRenderObject method
Updates the renderObject to reflect the current widget configuration.
Implementation
@override
void updateRenderObject(BuildContext context, RenderObject renderObject) {
final renderFlex = renderObject as RenderFlex;
renderFlex.direction = direction;
renderFlex.mainAxisAlignment = mainAxisAlignment;
renderFlex.crossAxisAlignment = crossAxisAlignment;
renderFlex.mainAxisSize = mainAxisSize;
}