@Override
  public RegionCoprocessorRpcChannel coprocessorService(byte[] row) {
    return new RegionCoprocessorRpcChannel(conn, getName(), null, row,
      getRpcTimeout(TimeUnit.NANOSECONDS), getOperationTimeout(TimeUnit.NANOSECONDS));
  }
The table implementation based on {@link AsyncTable}.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableOverAsyncTable.java