How do I check the value of an object's animation name in an 'if' statement?

Unity Engine
1 
                if (gameObject.GetCurrentAnimatorStateInfo(0).IsName("Walk Left")) {
                    // Check if animation is walking left, so that left idle animation can play
                }
                if (gameObject.GetCurrentAnimatorStateInfo(0).IsName("Walk Right")) {
                    // Check if animation is walking right, so that right idle animation can play
                }
                if (gameObject.GetCurrentAnimatorStateInfo(0).IsName("Walk Up")) {
                    // Check if animation is walking up, so that up idle animation can play
                }
                if (gameObject.GetCurrentAnimatorStateInfo(0).IsName("Walk Down")) {
                    // Check if animation is walking down, so that left down animation can play
                }

I’m trying to use an idle animation per direction.
I tried this code in the UPDATE void, but it returns
Type UnityEngine.GameObject' does not contain a definition for GetCurrentAnimatorStateInfo’ and no extension method GetCurrentAnimatorStateInfo' of type UnityEngine.GameObject’ could be found. Are you missing an assembly reference?
How do I fix this code?

2

Possibly you may be missing animator component