ClassCollectionLoader.php
private static function getOrderedClasses(array $classes)
    {
        $map = array();
        self::$seen = array();
        foreach ($classes as $class) {
            try {
                $reflectionClass = new \ReflectionClass($class);
            } catch (\ReflectionException $e) {
                throw new \InvalidArgumentException(sprintf('Unable to load class "%s"', $class));
            }

            $map = array_merge($map, self::getClassHierarchy($reflectionClass));
        }

        return $map;
    }
private static function getOrderedClasses(array $classes)
    {
        $map = array();
        self::$seen = array();
        foreach ($classes as $class) {
            try {
                $reflectionClass = new \ReflectionClass($class);
            } catch (\ReflectionException $e) {
                throw new \InvalidArgumentException(sprintf('Unable to load class "%s"', $class));
            }

            $map = array_merge($map, self::getClassHierarchy($reflectionClass));
        }

        return $map;
    }
Gets an ordered array of passed classes including all their dependencies.

@param array $classes

@return \ReflectionClass[] An array of sorted \ReflectionClass instances (dependencies added if needed)

@throws \InvalidArgumentException When a class can't be loaded