code: def get_clear_catalog_id_action(description=None):
      
      description = description or _("Unlink selected objects from existing course catalogs")
  
      def clear_catalog_id(modeladmin, request, queryset):  # pylint: disable=unused-argument
          """
          Clear the catalog ID for a selected EnterpriseCustomer.
          """
          queryset.update(catalog=None)
      clear_catalog_id.short_description = description
      return clear_catalog_id
docs: Return the action method to clear the catalog ID for a EnterpriseCustomer.