preparePlace example

public function dump(Definition $definition, Marking $marking = null, array $options = []): string
    {
        $this->linkCount = 0;
        $placeNameMap = [];
        $placeId = 0;

        $output = ['graph '.$this->direction];

        $meta = $definition->getMetadataStore();

        foreach ($definition->getPlaces() as $place) {
            [$placeNodeName, $placeNode, $placeStyle] = $this->preparePlace(
                $placeId,
                $place,
                $meta->getPlaceMetadata($place),
                \in_array($place, $definition->getInitialPlaces()),
                $marking?->has($place) ?? false
            );

            $output[] = $placeNode;

            if ('' !== $placeStyle) {
                $output[] = $placeStyle;
            }