public Builder clearRequestId() {
      requestId_ = getDefaultInstance().getRequestId();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Global request identifier auto-generated by the API.
</pre>

<code>string request_id = 9 [(.google.api.field_info) = { ... }</code>

@return This builder for chaining.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognitionResponseMetadata.java