pub trait SwapMemoryController {
// Required methods
fn usage_in_bytes(&self) -> Box<dyn ReadAttr<Bytes> + '_>;
fn limit_in_bytes(&self) -> Box<dyn AttrFile<Bytes> + '_>;
fn failcnt(&self) -> Box<dyn ReadAttr<usize> + '_>;
fn max_usage_in_bytes(&self) -> Box<dyn ReadAttr<Bytes> + '_>;
}