public function build($concrete)
    {
        // If the concrete type is actually a Closure, we will just execute it and
        // hand back the results of the functions, which allows functions to be
        // used as resolvers for more fine-tuned resolution of these objects.
        if ($concrete instanceof Closure) {
            return $concrete($this, $this->getLastParameterOverride());
        }

        try {
            $reflector = new ReflectionClass($concrete);
        } catch (ReflectionException $e) {
            throw new BindingResolutionException("Target class [$concrete] does not exist.", 0, $e);
        }