oneWithID method
Deletes a document from Firestore by its type and document ID.
Implementation
oneWithID(Type type, String documentID) async {
final String? className = FS.classNames[type];
if (className == null) {
throw UnsupportedError('No class name found for type: ${className}. Consider re-generating Firestorm data classes.');
}
DocumentReference ref = FS.instance.collection(className).doc(documentID);
return _batch.delete(ref);
}