Get current state of blend tree ?

Hi,

Ok I can check to see if a animation is playing in a sub state machine like below.

 private var idleState = Animator.StringToHash("Locomotion.Idle");  
 function Start (){
      _anim = GetComponent.<Animator>();                    
 }
 function Update ()
 {
      currentBaseState = _anim.GetCurrentAnimatorStateInfo(0);
      if (currentBaseState.nameHash == idleState){
           // Do Stuff
      }
 }

But I can't seem to check a blend tree like below, anyone know how to check a blend tree state?

I thought it would be something like ..

 private var AttackflameStraightState = Animator.StringToHash("Base Layer.Locomotion.Blend_Walk_Attack.Dragon_Flame_throwing_stright");

or adding Blend_Tree at he end, still don't work.

Thanks.