setIsStringValue example

if ($x->access_path) {
                    $base_obj->access_path = '(string) '.$x->access_path;
                }

                $value = (string) $var;

                $s = $this->parser->parse($value, $base_obj);
                $srep = $s->getRepresentation('contents');
                $svalrep = $s->value && 'contents' == $s->value->getName() ? $s->value : null;

                if ($srep || $svalrep) {
                    $x->setIsStringValue(true);
                    $x->value = $srep ?: $svalrep;

                    if ($srep) {
                        $x->replaceRepresentation($srep, 0);
                    }
                }

                $reps = \array_reverse($s->getRepresentations());

                foreach ($reps as $rep) {
                    $x->addRepresentation($rep, 0);
                }