There was a post here a while ago about a language that didn't use 'super' inside subclassed methods, but instead had something used in the parent class method

There was a post here a while ago about a language that didn't use 'super' inside subclassed methods, but instead had something used in the parent class method to call the same one in any subclass. I quite liked the idea of that. Looks like Module#prepend is there to do a similar thing.