moduleToConstructor.diff

function myThing(){
+  if(!(this instanceOf myThing)){
+    return new myThing();
+  }
+  var api = this;
-  var api = {};
  api.methodOne = function(params){
    //...
  };
  api.methodTwo = function(params){
    var something = api.methodOne(stuff);
    //...
  };
-  return api;
}