public Builder setPageTokenBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      pageToken_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<pre>
A token identifying a page of results to be returned. This should be a
`next_page_token` value returned from a previous List request.
If unspecified, the first page of results is returned.
</pre>

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

@param value The bytes for pageToken to set.
@return This builder for chaining.
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1beta/src/main/java/com/google/cloud/websecurityscanner/v1beta/ListCrawledUrlsRequest.java