@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      for (int i = 0; i < agentPools_.size(); i++) {
        output.writeMessage(1, agentPools_.get(i));
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(nextPageToken_)) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 2, nextPageToken_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
The list next page token.
</pre>

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

@return The bytes for nextPageToken.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferProto.java