code: def get_attachment_model():
      
  
      try:
          from .models import AbstractAttachment
          klass = apps.get_model(config["attachment_model"])
          if not issubclass(klass, AbstractAttachment):
              raise ImproperlyConfigured(
                  "SUMMERNOTE_CONFIG['attachment_model'] refers to model '%s' that is not "
                  "inherited from 'django_summernote.models.AbstractAttachment'" % config["attachment_model"]
              )
          return klass
      except ValueError:
          raise ImproperlyConfigured("SUMMERNOTE_CONFIG['attachment_model'] must be of the form 'app_label.model_name'")
      except LookupError:
          raise ImproperlyConfigured(
              "SUMMERNOTE_CONFIG['attachment_model'] refers to model '%s' that has not been installed" % config["attachment_model"]
          )
docs: Returns the Attachment model that is active in this project.