getOptional example

$code .= $type === "BreakStatement" ? "break" : "continue";
                if ($label = $node->getLabel()) {
                    $code .= " " . $this->renderNode($label);
                }
            break;
            case "CallExpression":
            case "NewExpression":
                if ($type === "NewExpression") {
                    $code .= "new ";
                    $optional = false;
                } else {
                    $optional = $node->getOptional();
                }
                $code .= $this->renderNode($node->getCallee()) .
                         ($optional ? "?." : "") .
                         "(" .
                         $this->renderOpts->sirb .
                         $this->joinNodes(
                            $node->getArguments(),
                            "," . $this->renderOpts->sao
                         ) .
                         $this->renderOpts->sirb .
                         ")";