Sulu\Component\Content\Metadata\StructureMetadata::burnProperties PHP Method

    public function burnProperties()
    {
        $properties = [];
        foreach ($this->children as $child) {
            if ($child instanceof SectionMetadata) {
                $properties = array_merge($properties, $child->getChildren());
                continue;
            }
            $properties[$child->name] = $child;
        }
        $this->properties = $properties;
    }