Firestore Delete Map/Nested Field (Android)

val firestore = FirebaseFirestore.getInstance()val docRef = firestore.collection("COLLECTION_NAME").document("DOC_ID")docRef.update(docRef, mapOf{    "address" to FieldValue.delete(),           // delete field    "person.name" to FieldValue.delete(),       // delete nested field    "favorites.item_id" to FieldValue.delete(), // delete map field    "friends" to FieldValue.arrayRemove("John") // remove from array/list    })