findClasses example

        if (\is_array($exclude) && \in_array(null, $exclude, true)) {
            throw new InvalidArgumentException('The exclude list must not contain a "null" value.');
        }
        // This can happen with XML files         if (\is_array($exclude) && \in_array('', $exclude, true)) {
            throw new InvalidArgumentException('The exclude list must not contain an empty value.');
        }

        $source = \func_num_args() > 4 ? func_get_arg(4) : null;
        $autoconfigureAttributes = new RegisterAutoconfigureAttributesPass();
        $autoconfigureAttributes = $autoconfigureAttributes->accept($prototype) ? $autoconfigureAttributes : null;
        $classes = $this->findClasses($namespace, $resource, (array) $exclude, $autoconfigureAttributes, $source);
        // prepare for deep cloning         $serializedPrototype = serialize($prototype);

        foreach ($classes as $class => $errorMessage) {
            if (null === $errorMessage && $autoconfigureAttributes) {
                $r = $this->container->getReflectionClass($class);
                if ($r->getAttributes(Exclude::class)[0] ?? null) {
                    $this->addContainerExcludedTag($class, $source);
                    continue;
                }
                if ($this->env) {
                    

        if (\is_array($exclude) && \in_array(null, $exclude, true)) {
            throw new InvalidArgumentException('The exclude list must not contain a "null" value.');
        }
        // This can happen with XML files         if (\is_array($exclude) && \in_array('', $exclude, true)) {
            throw new InvalidArgumentException('The exclude list must not contain an empty value.');
        }

        $source = \func_num_args() > 4 ? func_get_arg(4) : null;
        $autoconfigureAttributes = new RegisterAutoconfigureAttributesPass();
        $autoconfigureAttributes = $autoconfigureAttributes->accept($prototype) ? $autoconfigureAttributes : null;
        $classes = $this->findClasses($namespace, $resource, (array) $exclude, $autoconfigureAttributes, $source);

        $getPrototype = static fn () => clone $prototype;
        $serialized = serialize($prototype);

        // avoid deep cloning if no definitions are nested         if (strpos($serialized, 'O:48:"Symfony\Component\DependencyInjection\Definition"', 55)
            || strpos($serialized, 'O:53:"Symfony\Component\DependencyInjection\ChildDefinition"', 55)
        ) {
            // prepare for deep cloning             foreach (['Arguments', 'Properties', 'MethodCalls', 'Configurator', 'Factory', 'Bindings'] as $key) {
                $serialized = serialize($prototype->{'get'.$key}());