Pass firebase getOptions such as source?

[tonyxiao]

  export interface GetOptions {
    /**
     * Describes whether we should get from server or cache.
     *
     * Setting to `default` (or not setting at all), causes Firestore to try to
     * retrieve an up-to-date (server-retrieved) snapshot, but fall back to
     * returning cached data if the server can't be reached.
     *
     * Setting to `server` causes Firestore to avoid the cache, generating an
     * error if the server cannot be reached. Note that the cache will still be
     * updated if the server request succeeds. Also note that latency-compensation
     * still takes effect, so any pending write operations will be visible in the
     * returned data (merged into the server-provided data).
     *
     * Setting to `cache` causes Firestore to immediately return a value from the
     * cache, ignoring the server completely (implying that the returned value
     * may be stale with respect to the value on the server.) If there is no data
     * in the cache to satisfy the `get()` call, `DocumentReference.get()` will
     * return an error and `QuerySnapshot.get()` will return an empty
     * `QuerySnapshot` with no documents.
     */
    readonly source?: 'default' | 'server' | 'cache';
  }

This option supported by firestore does not appear to be supported by FireSQL.