FluidTYPO3\Flux\Form\AbstractFormField::getValidate PHP Method

    public function getValidate()
    {
        if (FALSE === (bool) $this->getRequired()) {
            $validate = $this->validate;
        } else {
            if (TRUE === empty($this->validate)) {
                $validate = 'required';
            } else {
                $validators = GeneralUtility::trimExplode(',', $this->validate);
                array_push($validators, 'required');
                $validate = implode(',', $validators);
            }
        }
        return $validate;
    }