SomeCleverNameConfig example

class NodeInitialValuesConfig implements \Symfony\Component\Config\Builder\ConfigBuilderInterface
{
    private $someCleverName;
    private $messenger;
    private $_usedProperties = [];

    public function someCleverName(array $value = []): \Symfony\Config\NodeInitialValues\SomeCleverNameConfig
    {
        if (null === $this->someCleverName) {
            $this->_usedProperties['someCleverName'] = true;
            $this->someCleverName = new \Symfony\Config\NodeInitialValues\SomeCleverNameConfig($value);
        } elseif (0 < \func_num_args()) {
            throw new InvalidConfigurationException('The node created by "someCleverName()" has already been initialized. You cannot pass values the second time you call someCleverName().');
        }

        return $this->someCleverName;
    }

    public function messenger(array $value = []): \Symfony\Config\NodeInitialValues\MessengerConfig
    {
        if (null === $this->messenger) {
            $this->_usedProperties['messenger'] = true;