/**
  * @return FileFormControlSet
  */
 static function fileSet($name, $label, $defaultCount = 1)
 {
     return FileFormControlSet::create($name, $label, $defaultCount);
 }
 function __construct($name, $label, $defaultInputCount = 1)
 {
     Assert::isPositiveInteger($defaultInputCount);
     parent::__construct($name, $label);
     $this->setDefaultValue(array_fill(0, $defaultInputCount, null));
 }