protected function htmlOptionsResult($value = '')
    {
        $class = !empty($this->defaults['resultClass']) ? $this->defaults['resultClass'] . $value : '';
        $style = !empty($this->defaults['resultStyle']) ? $this->defaults['resultStyle'] : '';

        if (!empty($this->bootstrapDefaults['resultClass'])) {
            $class .= $this->bootstrapDefaults['resultClass'];
        }
        if (!empty($this->bootstrapDefaults['resultStyle'])) {
            $style .= $this->bootstrapDefaults['resultStyle'];
        }
        if (!empty($this->resultClass) && is_string($this->resultClass)) {
            $class .= ' ' . $this->resultClass;
        }
        if (!empty($this->resultStyle) && is_string($this->resultStyle)) {
            $style .= ' ' . $this->resultStyle;
        }

        return [
            'class' => $class ?: null,
            'style' => $style ?: null,
        ];
    }