Angular custom template request provider

templateRequestProvider.js

module.config(["$provide", function ($provide) {

$provide.decorator("$templateRequest", [
    "$delegate", "$q", "$templateCache",// DI specifications
    function ($delegate, $q,$templateCache) {

        // replace the delegate function 
        $delegate = function (tpl) {
            var defer = $q.defer();
            // convert the tpl from trustedvaluetoken to string
            if (typeof (tpl) !== "string" || !!$templateCache.get(tpl)) {
                tpl = $sce.getTrustedResourceUrl(tpl);
            }
            // make proxy call and resolve the promise;
            return defer.promise;
        }
        // return the modified delegate function
        return $delegate;
    }]);

}]);