public Builder clearStringType() {
        stringType_ = getDefaultInstance().getStringType();
        bitField0_ = (bitField0_ & ~0x00002000);
        onChanged();
        return this;
      }
<code>optional string stringType = 14;</code>
@return This builder for chaining.
ql/src/gen/protobuf/gen-test/org/apache/hadoop/hive/ql/io/protobuf/SampleProtos.java