Nette\Forms\Controls\BaseControl::getHtmlName PHP Method

    public function getHtmlName()
    {
        return Nette\Forms\Helpers::generateHtmlName($this->lookupPath(Form::class));
    }

 /**
  * Returns HTML name of control.
  * @return string
  */
 public function getHtmlName()
 {
     return parent::getHtmlName() . '[]';
 }