code: function(num) {
        var fn = this, counter = 0, storedArguments = [];
        if(!isNumber(num)) {
          num = 1;
        } else if(num === 0) {
          fn.call();
          return fn;
        }
        return function() {
          var ret;
          storedArguments.push(multiArgs(arguments));
          counter++;
          if(counter == num) {
            ret = fn.call(this, storedArguments);
            counter = 0;
            storedArguments = [];
            return ret;
          }
        }
      }
docs: *
  @method after([num] = 1)
  @returns Function
  @short Creates a function that will execute after [num] calls.
  @extra %after% is useful for running a final callback after a series of asynchronous operations, when the order in which the operations will complete is unknown.
  @example
  
  var fn = (function() {
  // Will be executed once only
  }).after(3); fn(); fn(); fn();
  
  *