node.js routing- what is actually going on here

This is a simple node app with routing. Code follows :

var http = require("http");
var url = require("url");

var route = {
    routes:{},
    for:function(path, handler){

        console.log("route path = "+path);
        this.routes[path]= handler; 
    }

};

route.for("/start", function(request, response){

    response.writeHead(200,{"Content-Type":"text/plain"});

    response.write("Hello");
    response.end();
});

route.for("/finish", function(request, response){

    response.writeHead(200, {"Content-Type": "text/plain"});
    response.write("Goodbye");
    response.end();
});

function onRequest(request, response) {

    var pathname = url.parse(request.url).pathname;
    console.log("Request for " + pathname + " received.");
    if(typeof route.routes[pathname] ==='function'){

       console.log(" main pathname = "+pathname);
       route.routes[pathname](request, response);
   }else{
       response.writeHead(404, {"Content-Type": "text/plain"});
       response.end("404 Not Found");
     }

}// END OF ONrEQUEST

http.createServer(onRequest).listen(9999);
console.log("Server has started at 9999.");

When I run the app I see in console:

route path = /start

route path = /finish

Server has started at 9999.

When I hit at http://localhost:9999/finish, I find in console :

Request for /finish received.

main pathname = /finish

I am trying to understand the code- at first the route object variable is constructed.

Q1) How does the for property work there ?

Let us look at the following line :

route.for("/start", function(request, response){

It seems to be related with the for property in whatever ways.

Q2) How is it related with the for property ?

via Istiaque Ahmed