DART

flutter widget destructor

Dart does not have destructors. 
Objects are automatically garbage collected when no longer referenced

In flutter we can do like for widget dispose:

@override
void dispose() {
	// your dispose part
	super.dispose();
}

flutter widget destructor

//In a state of a statefull widget
@override
void dispose() {
	_bloc.dispose();
	super.dispose();
}