@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, parent_);
    }
    if (pageSize_ != 0) {
      output.writeInt32(2, pageSize_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(pageToken_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 3, pageToken_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The next_page_token value returned from a previous List request, if any.
</pre>

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

@return The bytes for pageToken.
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/ListReservationsRequest.java