public com.google.protobuf.ByteString
        getPartKeyBytes(int index) {
      return partKey_.getByteString(index);
    }
<code>repeated string part_key = 2;</code>
@param index The index of the value to return.
@return The bytes of the partKey at the given index.
llap-common/src/gen/protobuf/gen-java/org/apache/hadoop/hive/llap/daemon/rpc/LlapDaemonProtocolProtos.java