public Builder setPageTokenBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      pageToken_ = value;
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
<pre>
Optional. A token identifying a page of results for the server to return.
Typically obtained from next_page_token field in the response of a
ListExamples call.
</pre>

<code>string page_token = 4 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The bytes for pageToken to set.
@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/ListExamplesRequest.java