@java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }
<pre>
The next_page_token returned from a previous List request, if any.
</pre>

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

@return The bytes for pageToken.
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/ListProductsInProductSetRequest.java