State Machine Behaviour OnStateEnter Check previous state?

So I came up with my own solution for now, if you have a better one post it as an answer and I'll change it. What I ended up doing was getting the name hash every late update, so that I can check what state it was in the previous frame.

 void LateUpdate()
 {
     previousStateHash = animState.shortNameHash;
 }

And then any Behaviour scripts can check if the previous state was a state in particular by doing:

 override public void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
 {
     if(previousStateHash == Animator.StringToHash("Some_State"))
         Debug.Log("Transitioned from Some_State");
 }