public Builder clearRequestId() {
      requestId_ = getDefaultInstance().getRequestId();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
A unique id associated with this call.
This id is logged for tracking purposes.
</pre>

<code>string request_id = 1;</code>

@return This builder for chaining.
java-talent/proto-google-cloud-talent-v4/src/main/java/com/google/cloud/talent/v4/ResponseMetadata.java