What the problem is.

While performing readRows, the abstraction layer(ServerStreamingCallable<Query, RowT>) introduced by this library prevents user to create requests to target the table using an absolute resource name(Custom app-profile-id).

What you want to happen.

It would be helpful if we introduce these new API in EnhanceBigtableStub.java to expose ServerStreamingCallable<ReadRowsRequest, RowT>:

<RowT> ServerStreamingCallable<ReadRowsRequest, RowT> createReadRowsRawCallable(RowAdapter adapter) {
  return createReadRowsBaseCallable(adapter).withDefaultContext(..);
}

<RowT> ServerStreamingCallable<ReadRowsRequest, RowT> createReadRowsBaseCallable(RowAdapter adapter) {
  //... same impl as now, except without the UserFacingCallable
}

Related to an internal ticket.