public function getFontIconClassNames()
    {
        $classes = [];
        
        if ($this->owner->FontIcon) {
            
            if ($this->owner->FontIconListItem) {
                $classes[] = $this->backend->getClassName('list-item');
            }
            
            if ($this->owner->FontIconFixedWidth) {
                $classes[] = $this->backend->getClassName('fixed-width');
            }
            
            $classes[] = $this->backend->getClassName('icon', [$this->owner->FontIcon]);
            
        }
        
        return $classes;
    }