What is the difference between StartCoroutine and StartCoroutine_Auto

I see these two functions, but what are the differences.
StartCoroutine_Auto is not listed in the documentation.

I am more curious than anything.

If it’s not documented API, using it is not supported.

[deprecated]

‘MonoBehaviour.StartCoroutine_Auto(IEnumerator)’ is obsolete. Use StartCoroutine instead.198306-screenshot-382.png