docs: function fixArgumentLength(fn) {
    var staticFn = function(a) {
      var args = arguments;
      return fn(a, args[1], args[2], args.length - 1);
    };
    staticFn.instance = function(b) {
      var args = arguments;
      return fn(this, b, args[1], args.length);
    };
    return staticFn;
  }