A question for later. This in ability makes testing difficult.

How can a provider reference itself?

provider('widget', [function(){
		var that = this;
		this.hi = function(){
			return 'Hi';
		};
		this.$get = [function(){
			return {
				hello : function(){
					/*
					* How can a provider reference it self?
					* */
					world();
				},
				world: function(){
					return 'Hello World'
				},
				hi: function(){
					console.log(this.hi());
					console.log(that.hi());
				}
			}
		}];
	}]);