public State <TModelData> AddState(StatePredicate <TModelData> handler)
{
var state = new State <TModelData>(handler);
_states.Add(state);
return(state);
}
public State(StatePredicate <TModelData> predicate)
{
Predicate = predicate ?? throw new ArgumentNullException(nameof(predicate));
Negative = new State <TModelData>(m => !Predicate(m));
}
