public Builder setRequestIdBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      requestId_ = value;
      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>

@param value The bytes for requestId to set.
@return This builder for chaining.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognitionResponseMetadata.java