Doc abstract function.

lib/resolve/Resolver.js

@@ -45,16 +45,17 @@ Resolver.prototype.resolve = function () {
     .then(this._parseJson.bind(this));
 };
 
+Resolver.prototype.hasNew = function (oldResolution) {
+    return Q.resolve(true);
+};
+
 Resolver.prototype.getDependencies = function () {
     return this._json.dependencies;
 };
 
 // -----------------
 
-Resolver.prototype.hasNew = function (oldResolution) {
-    return Q.resolve(true);
-};
-
+// Abstract function that should be implemented by concrete resolvers
 Resolver.prototype._resolveSelf = function () {};
 
 // -----------------