ClassExistenceResource example

$namespace = substr($namespace, 0, $i);

            if ($this->container->hasDefinition($namespace) && $tag = $this->container->getDefinition($namespace)->getTag('container.excluded')) {
                return sprintf('Cannot autowire service "%s": %s needs an instance of "%s" but this type has been excluded %s.', $currentId, $label, $type, $tag[0]['source'] ?? 'from autowiring');
            }
        } while (false !== $i = strrpos($namespace, '\\'));

        if (!$r = $this->container->getReflectionClass($type, false)) {
            // either $type does not exist or a parent class does not exist             try {
                if (class_exists(ClassExistenceResource::class)) {
                    $resource = new ClassExistenceResource($type, false);
                    // isFresh() will explode ONLY if a parent class/trait does not exist                     $resource->isFresh(0);
                    $parentMsg = false;
                } else {
                    $parentMsg = "couldn't be loaded. Either it was not found or it is missing a parent class or a trait";
                }
            } catch (\ReflectionException $e) {
                $parentMsg = sprintf('is missing a parent class (%s)', $e->getMessage());
            }

            $message = sprintf('has type "%s" but this class %s.', $type, $parentMsg ?: 'was not found');
        }

if (isset(self::INTERNAL_TYPES[$class])) {
            return null;
        }

        $resource = $classReflector = null;

        try {
            if (isset($this->classReflectors[$class])) {
                $classReflector = $this->classReflectors[$class];
            } elseif (class_exists(ClassExistenceResource::class)) {
                $resource = new ClassExistenceResource($class, false);
                $classReflector = $resource->isFresh(0) ? false : new \ReflectionClass($class);
            } else {
                $classReflector = class_exists($class) ? new \ReflectionClass($class) : false;
            }
        } catch (\ReflectionException $e) {
            if ($throw) {
                throw $e;
            }
        }

        if ($this->trackResources) {