SpannerRpc.StreamingCall | 
SpannerRpc.executeQuery(ExecuteSqlRequest request,
            SpannerRpc.ResultStreamConsumer consumer,
            Map<SpannerRpc.Option,?> options)  | 
SpannerRpc.StreamingCall | 
GapicSpannerRpc.executeQuery(ExecuteSqlRequest request,
            SpannerRpc.ResultStreamConsumer consumer,
            Map<SpannerRpc.Option,?> options)  | 
SpannerRpc.StreamingCall | 
SpannerRpc.read(ReadRequest request,
    SpannerRpc.ResultStreamConsumer consumer,
    Map<SpannerRpc.Option,?> options)  | 
SpannerRpc.StreamingCall | 
GapicSpannerRpc.read(ReadRequest request,
    SpannerRpc.ResultStreamConsumer consumer,
    Map<SpannerRpc.Option,?> options)  |