public Builder setNextPageTokenBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      nextPageToken_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<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>

@param value The bytes for nextPageToken to set.
@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/ListProductSetsResponse.java