code: def get_resource_type_from_included_serializer(self):
          
          field_name = self.field_name or self.parent.field_name
          parent = self.get_parent_serializer()
  
          if parent is not None:
              # accept both singular and plural versions of field_name
              field_names = [
                  inflection.singularize(field_name),
                  inflection.pluralize(field_name)
              ]
              includes = get_included_serializers(parent)
              for field in field_names:
                  if field in includes.keys():
                      return get_resource_type_from_serializer(includes[field])
  
          return None
docs: Check to see it this resource has a different resource_name when
          included and return that name, or None