public function resolve(Command $command)
    {
        $commandName = get_class($command);

        // Find the CommandHandler if it has been manually defined using pushHandler()
        foreach ($this->handlers as $handlerCommand => $handler) {
            if ($handlerCommand == $commandName) {
                return $handler;
            }
        }

        // If the Command also implements CommandHandler, then it can handle() itself
        if ($command instanceof CommandHandler) {
            return $command;
        }

        // Try and guess the handler's name in the same namespace with suffix "Handler"
        $class = $commandName . 'Handler';
        if (class_exists($class)) {
            return $this->container->make($class);
        }

        // Try and guess the handler's name in nested "Handlers" namespace with suffix "Handler"
        $classParts = explode('\\', $commandName);
        $commandNameWithoutNamespace = array_pop($classParts);
        $class = implode('\\', $classParts) . '\\Handlers\\' . $commandNameWithoutNamespace . 'Handler';
        if (class_exists($class)) {
            return $this->container->make($class);
        }

        throw new UnresolvableCommandHandlerException('Could not resolve a handler for [' . get_class($command) . ']');
    }