exists<T extends Yubikiri> static method
Implementation
static bool exists<T extends Yubikiri>(BuildContext context) {
final providerElement = context.getElementForInheritedWidgetOfExactType<TestYubikiriProvider<T>>();
context.findAncestorWidgetOfExactType<TestYubikiriProvider<T>>();
return providerElement != null;
}