renderObject<T extends RenderObject> method

T renderObject <T extends RenderObject>(Finder finder)

The render object of the matching widget in the widget tree.

Throws a StateError if finder is empty or matches more than one widget (even if they all have the same render object).

  • Use firstRenderObject if you expect to match several render objects but only want the first.
  • Use renderObjectList if you expect to match several render objects and want all of them.

Implementation 

T renderObject<T extends RenderObject>(Finder finder) {
  TestAsyncUtils.guardSync();
  return finder.evaluate().single.renderObject;
}