I want to call removeSomething() (see in line 9) internally:

JS-Code is:

    (function($){
      $.fn.extend({
        Engine: function(options) {
          var defaults = {
           ...
          };
          var options = $.extend(defaults, options);

          removeSomething();

          //-----------------------------------------------------------------------
          //Public Functions ------------------------------------------------------
          //-----------------------------------------------------------------------

          this.removeSomething = function() {
            ...
          }; 
        }
      });
   })(jQuery);

But if I call removeSomething console outputs that removeSomething is not a function, how do I have to call this function? The function should be available internally and externally.

Thanks for help!