@java.lang.Override
    public Builder toBuilder() {
      return this == DEFAULT_INSTANCE
          ? new Builder() : new Builder().mergeFrom(this);
    }
<code>optional string value = 2;</code>
@return The bytes for value.
ql/src/gen/protobuf/gen-test/org/apache/hadoop/hive/ql/io/protobuf/SampleProtos.java