public Builder clearValue() {
        value_ = getDefaultInstance().getValue();
        bitField0_ = (bitField0_ & ~0x00000002);
        onChanged();
        return this;
      }
<code>optional string value = 2;</code>
@return This builder for chaining.
ql/src/gen/protobuf/gen-test/org/apache/hadoop/hive/ql/io/protobuf/SampleProtos.java