invoke
operator fun FirebaseFirestore.Companion.invoke(ios: <Error class: unknown class>): FirebaseFirestore(source)
operator fun DocumentReference.Companion.invoke(ios: <Error class: unknown class>): DocumentReference(source)
operator fun CollectionReference.Companion.invoke(ios: <Error class: unknown class>): CollectionReference(source)
operator fun DocumentSnapshot.Companion.invoke(ios: <Error class: unknown class>): DocumentSnapshot(source)