docs: public void stream(@Nonnull final ApiStreamObserver<DocumentSnapshot> responseObserver) {
      stream(
          new QuerySnapshotObserver() {
            @Override
            public void onNext(QueryDocumentSnapshot documentSnapshot) {
              responseObserver.onNext(documentSnapshot);
            }
  
            @Override
            public void onError(Throwable throwable) {
              responseObserver.onError(throwable);
            }
  
            @Override
            public void onCompleted() {
              responseObserver.onCompleted();
            }
          },
          null);
    }