211     sys_info: Option<Arc<dyn IndexNode>>,  field
224             sys_info: None,  in new()
243     fn sys_info(&self) -> Option<Arc<dyn IndexNode>> {  in sys_info()  method
244         return self.0.lock().sys_info.clone();  in sys_info()
249     fn set_sys_info(&self, sys_info: Option<Arc<dyn IndexNode>>) {  in set_sys_info()
250         self.0.lock().sys_info = sys_info;  in set_sys_info()
334     sys_info: Option<Arc<dyn IndexNode>>,         // 总线sys information  field
346             sys_info: Option::None,  in new()
366     fn set_sys_info(&self, sys_info: Option<Arc<dyn IndexNode>>) {  in set_sys_info()
367         self.0.lock().sys_info = sys_info;  in set_sys_info()
372     fn sys_info(&self) -> Option<Arc<dyn IndexNode>> {  in sys_info()  method
373         return self.0.lock().sys_info.clone();  in sys_info()