$mform->addElement('text', '{{ id }}', get_string('{{ id }}', '{{ langCategory }}'), array('value'=>"DEFAULT", 'maxlength' => 255, 'size' => 50));
        //$mform->setType('{{ id }}', PARAM_RAW);
        //$mform->setDefault('{{ id }}', 'defult string value for the textarea');
{% include 'form/form-common-element.twig' %}