@Override
      public Void answer(InvocationOnMock invocation) throws Throwable {
        ClientProtos.MultiResponse resp =
          ClientProtos.MultiResponse.newBuilder()
            .addRegionActionResult(RegionActionResult.newBuilder().addResultOrException(
              ResultOrException.newBuilder().setResult(ProtobufUtil.toResult(new Result()))))
            .build();
        RpcCallback<ClientProtos.MultiResponse> done = invocation.getArgument(2);
        done.run(resp);
        return null;
      }
Confirm that we will set the priority in {@link HBaseRpcController} for several table operations.
hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestAsyncTableRpcPriority.java