gistfile1.js

!function(constructorObject, undefined){
  constructorObject.plugin(function(self, options){
    //Plugin constructor code goes here
    //Now you have access to the self object and options by reference
    if(typeof options !== "undefined" && options.property)//put some logic here...
      self.protofunc();//call a function on itself
  });
  
  constructorObject.prototype.protofunc = function(){// in the closure space, modify it's prototype
    console.log("hello world!");
  }
  
}(constructorObject/*, additional plugin dependencies*/)