attach method
void
attach(
- T state
Implementation
void attach(T state) {
// print('hi attach self=$hashCode _states=${_states.map((s) => s.hashCode).toList()} state=${state.hashCode}');
assert(!_states.contains(state),
'want to attach() but it already exists _states=${_states.map((s) => s.hashCode).toList()} state=${state.hashCode}');
_states.add(state);
}