Cannot resolve symbol FirebaseVisionTextDetector

I get Cannot resolve symbol FirebaseVisionTextDetector error when I put in my module:

import com.google.firebase.ml.vision.text.FirebaseVisionTextDetector;

I can't understand why because in gradle I have the correct implementation:

implementation 'com.google.firebase:firebase-ml-vision:18.0.1'

SOLVED

I have solved by downgrading to 16.0.0. Still don't know the reason why.

implementation 'com.google.firebase:firebase-ml-vision:16.0.0'

from Cannot resolve symbol FirebaseVisionTextDetector