App\Source\ModelFieldBuilder\JsonMultiField::__toString PHP Метод

    public function __toString()
    {
        $str = '<div class="json-multiply json-multi-' . $this->name . '"><div class="form-group input-group">';
        $str .= '<a href="javascript:void(0);" class="input-group-addon add btn btn-primary">+</a>';
        $str .= sprintf('<input disabled type="%s" name="%s" value="%s" #>', $this->type, $this->name, htmlspecialchars($this->value));
        $str .= '</div></div>';
        $this->className = "disabled-jsonmulti jsonmultivalue " . $this->className;
        return $this->toString($str) . $valueField;
    }