Finds widgets by searching for elements with a particular type.
This does not do subclass tests, so for example
byElementType(VirtualViewportElement) will never find anything
since that's an abstract class.
The type argument must be a subclass of Element.
Example:
expect(tester, hasWidget(find.byElementType(SingleChildRenderObjectElement)));
If the skipOffstage argument is true (the default), then this skips
nodes that are Offstage or that are from inactive Routes.
Source
Finder byElementType(Type type, { bool skipOffstage: true }) => new _ElementTypeFinder(type, skipOffstage: skipOffstage);