src/main/java/com/github/oxo42/stateless4j/StateMachine.java
public void onUnhandledTrigger(Action3<S, T, Object[]> unhandledTriggerAction) {
        if (unhandledTriggerAction == null) {
            throw new IllegalStateException("unhandledTriggerAction");
        }
        this.unhandledTriggerAction = unhandledTriggerAction;
    }
public void onUnhandledTrigger(Action3<S, T, Object[]> unhandledTriggerAction) {
        if (unhandledTriggerAction == null) {
            throw new IllegalStateException("unhandledTriggerAction");
        }
        this.unhandledTriggerAction = unhandledTriggerAction;
    }
public void onUnhandledTrigger ( Action3 < S , T , Object [ ] > unhandledTriggerAction ) { if ( unhandledTriggerAction == null ) { throw new IllegalStateException ( "unhandledTriggerAction" ) ; } this . unhandledTriggerAction = unhandledTriggerAction ; }
Override the default behaviour of throwing an exception when an unhandled trigger is fired

@param unhandledTriggerAction An action to call with state, trigger and params when an unhandled trigger is fired
Override the default behaviour of throwing an exception when an unhandled trigger is fired