//// [fatarrowfunctionsInFunctions.ts]
declare function setTimeout(expression: any, msec?: number, language?: any): number;

var messenger = {
    message: "Hello World",
    start: function() {
        var _self = this;
        setTimeout(function() {
            _self.message.toString(); 
        }, 3000); 
    }
}; 
messenger.start(); 


//// [fatarrowfunctionsInFunctions.js]
var messenger = {
    message: "Hello World",
    start: function () {
        var _self = this;
        setTimeout(function () {
            _self.message.toString();
        }, 3000);
    }
};
messenger.start();