code: def del_method(self, m):
          
          if isinstance(m, types.FunctionType) and not iscoroutinefunction(m):
              wrkey = ('function', id(m))
          else:
              f, obj = get_method_vars(m)
              wrkey = (f, id(obj))
          if wrkey in self:
              del self[wrkey]
docs: Remove an instance method or function if it exists
  
          Args:
              m: The instance method or function to remove