options = function (localOptions) {
            if (localOptions) {
                middlewareOptions.find(function (middleware) {
                    return middleware.options === opt;
                }).localOptions = localOptions;
            }

            syncOptions();

            return opt;
        }
Express middleware
@param {(string|number)} strDuration Duration to cache responses
for.
@param {function(Object, Object):boolean} middlewareToggle 
@param {Object} localOptions Options for APICache
@returns