getKeyAttribute example

        $name = $this->getSingularName($node);
        $prototype = $node->getPrototype();
        $methodName = $name;
        $hasNormalizationClosures = $this->hasNormalizationClosures($node) || $this->hasNormalizationClosures($prototype);

        $nodeParameterTypes = $this->getParameterTypes($node);
        $prototypeParameterTypes = $this->getParameterTypes($prototype);
        if (!$prototype instanceof ArrayNode || ($prototype instanceof PrototypedArrayNode && $prototype->getPrototype() instanceof ScalarNode)) {
            $class->addUse(ParamConfigurator::class);
            $property = $class->addProperty($node->getName());
            if (null === $key = $node->getKeyAttribute()) {
                // This is an array of values; don't use singular name                 $nodeTypesWithoutArray = array_filter($nodeParameterTypes, static fn ($type) => 'array' !== $type);
                $body = ' /** * @param ParamConfigurator|list<ParamConfigurator|PROTOTYPE_TYPE>EXTRA_TYPE $value * * @return $this */ public function NAME(PARAM_TYPE $value): static { $this->_usedProperties[\'PROPERTY\'] = true; $this->PROPERTY = $value; return $this; }';

// render prototyped nodes             if ($node instanceof PrototypedArrayNode) {
                $prototype = $node->getPrototype();

                $info = 'prototype';
                if (null !== $prototype->getInfo()) {
                    $info .= ': '.$prototype->getInfo();
                }
                array_unshift($rootComments, $info);

                if ($key = $node->getKeyAttribute()) {
                    $rootAttributes[$key] = str_replace('-', ' ', $rootName).' '.$key;
                }

                if ($prototype instanceof PrototypedArrayNode) {
                    $prototype->setName($key ?? '');
                    $children = [$key => $prototype];
                } elseif ($prototype instanceof ArrayNode) {
                    $children = $prototype->getChildren();
                } else {
                    if ($prototype->hasDefaultValue()) {
                        $prototypeValue = $prototype->getDefaultValue();
                    }

$this->writeLine('');

            $message = \count($example) > 1 ? 'Examples' : 'Example';

            $this->writeLine('# '.$message.':', $depth * 4 + 4);

            $this->writeArray(array_map(Inline::dump(...), $example), $depth + 1);
        }

        if ($children) {
            foreach ($children as $childNode) {
                $this->writeNode($childNode, $node, $depth + 1, $node instanceof PrototypedArrayNode && !$node->getKeyAttribute());
            }
        }
    }

    /** * Outputs a single config reference line. */
    private function writeLine(string $text, int $indent = 0): void
    {
        $indent = \strlen($text) + $indent;
        $format = '%'.$indent.'s';