old_contents: from apps.contacts.models import BaseContact
  
  
  class ContactMixin(object):
      """
      Would be used for adding contacts functionality to models with contact data.
      """
  
      def get_contacts(self, is_primary=False):
          """
          Returns dict with all contacts.
          Example:
          >> obj.get_contacts()
          << {'email': [], 'skype': []}
  
          :param is_primary:
          :return:
          """
          subclasses = BaseContact.__subclasses__()
          results = {}
          for cls in subclasses:
              queryset = cls.objects.filter(employee_id=self.id)
              key, verbose = cls.CONTACT_EXTRA_DATA
              if is_primary:
                  queryset = queryset.filter(is_primary=True)
              results.setdefault(key, queryset)
          return results
  
new_contents: from apps.contacts.models import BaseContact
  
  
  class ContactMixin(object):
      """
      Would be used for adding contacts functionality to models with contact data.
      """
  
      def get_contacts(self, is_primary=False):
          """
          Returns dict with all contacts.
          Example:
          >> obj.get_contacts()
          << {'email': [], 'skype': []}
  
          :param is_primary: bool Return only primary contacts.
          :return: dict
          """
          subclasses = BaseContact.__subclasses__()
          results = {}
          for cls in subclasses:
              queryset = cls.objects.filter(employee_id=self.id)
              key, verbose = cls.CONTACT_EXTRA_DATA
              if is_primary:
                  queryset = queryset.filter(is_primary=True)
              results.setdefault(key, queryset)
          return results
  
subject: Fix description for contact mixin