code: def has_edit_permission(self, request, obj=None, version=None):
          
          # Has the edit permission for this object type
          permission_name = '{}.edit_{}'.format(self.opts.app_label, self.opts.model_name)
          has_permission = request.user.has_perm(permission_name)
  
          if obj is not None and has_permission is False:
              has_permission = request.user.has_perm(permission_name, obj=obj)
  
          if has_permission and version is not None:
              # Version must not be saved, and must belong to this user
              if version.version_number or version.owner != request.user:
                  has_permission = False
  
          return has_permission
docs: Returns a boolean if the user in the request has edit permission for the object.
  
          Can also be passed a version object to check if the user has permission to edit a version
          of the object (if they own it).