public Builder clearNextPageToken() {
      nextPageToken_ = getDefaultInstance().getNextPageToken();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }
<pre>
A token identifying a page of results the server should return.
</pre>

<code>string next_page_token = 2;</code>

@return This builder for chaining.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ListSeriesResponse.java