public function applyButtonClasses(array $data)
    {
        if ($this->hasAnyClass($this->buttonClasses, $data)) {
            $data = $this->injectClasses(['btn'], $data);
        } else {
            $data = $this->injectClasses(['btn', 'btn-default'], $data);
        }

        return $this->renameClasses($this->buttonClassAliases, $data);
    }