public static Builder newBuilder(com.google.cloud.vision.v1.ListProductsResponse prototype) {
    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
  }
<pre>
Token to retrieve the next page of results, or empty if there are no more
results in the list.
</pre>

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

@return The bytes for nextPageToken.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/ListProductsResponse.java