of static method
Retrieves the DartBlockEditor's ProviderContainer from the context.
Throws an assertion error if no DartBlockContainerProvider is found in the widget tree. Use this when you're certain the context is within a DartBlockEditor.
Implementation
static ProviderContainer of(BuildContext context) {
final container = maybeOf(context);
assert(
container != null,
'DartBlockContainerProvider not found in widget tree. '
'This widget must be a descendant of DartBlockEditor.',
);
return container!;
}