CustomLink : Extends the built-in ModelSerializer to enforce calling full_clean() on a copy of the associated instance during validation. (DRF does not do this by default; see https://github.com/encode/django-rest-framework/issues/3144)
The class of the first link in a group will be used for the dropdown button * default - Default * blue - Blue * indigo - Indigo * purple - Purple * pink - Pink * red - Red * orange - Orange * yellow - Yellow * green - Green * teal - Teal * cyan - Cyan * gray - Gray * black - Black * white - White * ghost-dark - Link