[java-firestore] Does Firestore support exists precondition for delete?

Does Firestore support exists precondition for delete?

Here it is mentioned: https://firebase.google.com/docs/firestore/reference/rest/v1/Precondition

However in Java it is not public: https://github.com/googleapis/java-firestore/blob/main/google-cloud-firestore/src/main/java/com/google/cloud/firestore/Precondition.java#L45

Which one it is? Can you enable it in Java?

Thanks!