docs: function MANDATORY_SETTER_FUNCTION(name) {
      function SETTER_FUNCTION(value) {
        _emberMetalDebug.assert('You must use Ember.set() to set the `' + name + '` property (of ' + this + ') to `' + value + '`.', false);
      }
  
      SETTER_FUNCTION.isMandatorySetter = true;
      return SETTER_FUNCTION;
    }