code: function _wrapMixinMethod(method) {
      return function() { // ,... arguments
          var mixinInstance = _getMixinInstance.call(this, method.name);
          return method.apply(mixinInstance || this, arguments);
      };
  }
docs: Returns method that will be exposed on the host class prototype
  
  @private
  @param {Function} this Mixin subclass (not instance)
  @return {Function}