@java.lang.Override
  public final boolean isInitialized() {
    byte isInitialized = memoizedIsInitialized;
    if (isInitialized == 1) return true;
    if (isInitialized == 0) return false;

    memoizedIsInitialized = 1;
    return true;
  }
<pre>
Optional. A token identifying a page of results the server should return.
Typically, this is the value of
ListAdaptiveMtFilesResponse.next_page_token returned from the
previous call to `ListAdaptiveMtFiles` method. The first page is
returned if `page_token`is empty or missing.
</pre>

<code>string page_token = 3 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for pageToken.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/ListAdaptiveMtFilesRequest.java