public Builder clearPageToken() {
      pageToken_ = getDefaultInstance().getPageToken();
      bitField0_ = (bitField0_ & ~0x00000004);
      onChanged();
      return this;
    }
<pre>
A token identifying a page of results for the server to return.
Typically obtained via
[ListCorporaResponse.next_page_token][google.cloud.visionai.v1.ListCorporaResponse.next_page_token]
of the previous
[Warehouse.ListCorpora][google.cloud.visionai.v1.Warehouse.ListCorpora]
call.
</pre>

<code>string page_token = 3;</code>

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