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    /**     * Returns a function that composes multiple functions, passing results to     * each other.     */    function compose() {        var fns = arguments;        return function(arg){            // only cares about the first argument since the chain can only            // deal with a single return value anyway. It should start from            // the last fn.            var n = fns.length;            while (n--) {                arg = fns[n].call(this, arg);            }            return arg;         };     }     module.exports = compose;
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