/**
     * Creates a document referred to by this `DocumentReference` with the
     * provided object values. The write fails if the document already exists
     *
     * @param data The object data to serialize as the document.
     * @throws Error If the provided input is not a valid Firestore document.
     * @return A Promise resolved with the write time of this create.
     */
    create(data: WithFieldValue<T>): Promise<WriteResult>;