Filter gdrts_render_single_thumbs_rating_args_classes is used to filter the CSS classes applied to the single rating block for Thumbs Rating method templates. This filter has 2 arguments:
- $classes: an array of CSS classes
- $render_object: the instance of the render object
It is highly recommended to use this filter to add new classes, not remove existing classes. Removing classes using this filter can cause rating block to break.