src/Container.php
public function getReturnType($name)
    {
        $container = new ReflectionClass($this);

        try {
            $method = $container->getMethod('get' . self::normalizeName($name));
            $doc    = $method->getDocComment();
            
            if (!empty($doc)) {
                preg_match('/@return ([a-zA-Z0-9_\x7f-\xff\x5c]+)/', $doc, $matches);

                if (isset($matches[1])) {
                    return $matches[1];
                }
            }
        } catch (ReflectionException $e) {
            // method does not exist
        }

        // as fallback we get the service and return the used type
        $service = $this->get($name);

        if (is_object($service)) {
            return get_class($service);
        } else {
            return gettype($service);
        }
    }
public function getReturnType($name)
    {
        $container = new ReflectionClass($this);

        try {
            $method = $container->getMethod('get' . self::normalizeName($name));
            $doc    = $method->getDocComment();
            
            if (!empty($doc)) {
                preg_match('/@return ([a-zA-Z0-9_\x7f-\xff\x5c]+)/', $doc, $matches);

                if (isset($matches[1])) {
                    return $matches[1];
                }
            }
        } catch (ReflectionException $e) {
            // method does not exist
        }

        // as fallback we get the service and return the used type
        $service = $this->get($name);

        if (is_object($service)) {
            return get_class($service);
        } else {
            return gettype($service);
        }
    }
Tries to determine the return type of a service. At first we try to
determine the type from the return annotation which is in most cases
more useful because it could specify an interface instead of an concrete
implementation. As fallback we get an instance of the service and return
the type

@param string $name
@return string
@throws \ReflectionException
@throws \Psr\Container\NotFoundExceptionInterface