public function getListItemButtonsConfig()
    {
        $config = [];
        
        if (is_array($this->owner->config()->default_list_item_buttons)) {
            $config = $this->owner->config()->default_list_item_buttons;
        }
        
        if (is_array($this->owner->config()->list_item_buttons)) {
            
            foreach ($this->owner->config()->list_item_buttons as $name => $spec) {
                
                if (!$spec) {
                    unset($config[$name]);
                }
                
            }
            
            $config = array_merge_recursive($config, $this->owner->config()->list_item_buttons);
            
        }
            
        return $config;
    }