Is there any way to make animation event calling function from the other gameobject with a script?

As the description of the title, I want to call the function from parent gameobject, namely MyFunction, from Animator. I can add a new script class in gameobject which same to Animator's, and then calling the function in this new script to call the function in my parent object, namely MyFunction like the following picture. It works but just takes too much work that I I need to add a new intermediary script every time.

Is there any way by using the same script and I can drag a reference of function in inspector under the animation gameobject?