code: def apply(self, builder, model):
          
          builder.where_null(model.get_qualified_deleted_at_column())
  
          self.extend(builder)
docs: Apply the scope to a given query builder.
  
          :param builder: The query builder
          :type builder: orator.orm.builder.Builder
  
          :param model: The model
          :type model: orator.orm.Model