@java.lang.Override
  public java.lang.String getNextPageToken() {
    java.lang.Object ref = nextPageToken_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      nextPageToken_ = s;
      return s;
    }
  }
<pre>
A token identifying a page of results the server should return.
</pre>

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

@return The nextPageToken.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ListDraftsResponse.java