of<T extends IStateObservable<Object?> > static method
Method that allows widgets to access a Bloc instance
as long as their BuildContext
contains a BlocScope instance.
If we want to access an instance of BlocA
which was provided higher up
in the widget tree we can do so via:
BlocScope.of<BlocA>(context);
Implementation
static T of<T extends IStateObservable<Object?>>(
BuildContext context, {
bool listen = true,
}) {
try {
return Scope.of<T>(
context,
listen: listen,
);
} on ScopeNotFoundException catch (e) {
if (e.valueType != T) rethrow;
throw FlutterError(
'''
BlocScope.of() called with a context that does not contain a $T.
No ancestor could be found starting from the context that was passed to BlocScope.of<$T>().
This can happen if the context you used comes from a widget above the BlocScope.
The context used was: $context
''',
);
}
}