78     open_files: Mutex<HashMap<Handle, OpenFileBuf>>,
79     open_dirs: Mutex<HashMap<Handle, OpenDirBuf>>,
99 type Handle = u64;  typedef
152     type Handle = Handle;  typedef
180         _handle: Option<Self::Handle>,  in getattr()  argument
191     ) -> io::Result<(Option<Self::Handle>, fuse::filesystem::OpenOptions)> {  in open()  argument
193         let handle = inode as Handle;  in open()
224         _handle: Self::Handle,  in release()  argument
233         let handle = inode as Handle;  in release()
248         handle: Self::Handle,  in read()  argument
272     ) -> io::Result<(Option<Self::Handle>, fuse::filesystem::OpenOptions)> {  in opendir()  argument
274         let handle = inode as Handle;  in opendir()
298         _handle: Self::Handle,  in releasedir()  argument
301         let handle = inode as Handle;  in releasedir()
316         _handle: Self::Handle,  in readdir()  argument
321         let handle = inode as Handle;  in readdir()