157     dev_file: Option<File>,  field
172         let dev_file = OpenOptions::new()  in new()  localVariable
176         match dev_file {  in new()
177             Ok(dev_file) => Self {  in new()
178                 dev_file: Some(dev_file),  in new()
185                 Self { dev_file: None }  in new()
192         if let Some(dev_file) = &self.dev_file {  in create()
197                     dev_file,  in create()
229         let dev_file = self.dev_file.as_ref().map(File::try_clone).transpose()?;  in try_clone()  localVariable
230         Ok(Self { dev_file })  in try_clone()
236         if let Some(dev_file) = &self.dev_file {  in as_raw_descriptors()
237             vec![dev_file.as_raw_descriptor()]  in as_raw_descriptors()