protected function completeForOptionShortcuts()
    {
        $word = $this->context->getCurrentWord();

        if (strpos($word, '-') === 0 && strlen($word) == 2) {
            $definition = $this->command ? $this->command->getNativeDefinition() : $this->application->getDefinition();

            if ($definition->hasShortcut(substr($word, 1))) {
                return array($word);
            }
        }

        return false;
    }