@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 (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(query_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, query_);
    }
    if (pageSize_ != 0) {
      output.writeInt32(3, pageSize_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(pageToken_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 4, pageToken_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
Optional. The page token, received from a previous search call.
It can be provided to retrieve the subsequent page.
</pre>

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

@return The bytes for pageToken.
java-telcoautomation/proto-google-cloud-telcoautomation-v1/src/main/java/com/google/cloud/telcoautomation/v1/SearchDeploymentRevisionsRequest.java