130     open_files: Mutex<HashMap<Handle, OpenFile>>,
131     open_dirs: Mutex<HashMap<Handle, OpenDirBuf>>,
155 type Handle = u64;  typedef
215     type Handle = Handle;  typedef
243         _handle: Option<Self::Handle>,  in getattr()  argument
254     ) -> io::Result<(Option<Self::Handle>, fuse::filesystem::OpenOptions)> {  in open()  argument
256         let handle = inode as Handle;  in open()
303         _handle: Self::Handle,  in release()  argument
312         let handle = inode as Handle;  in release()
328         handle: Self::Handle,  in read()  argument
365     ) -> io::Result<(Option<Self::Handle>, fuse::filesystem::OpenOptions)> {  in opendir()  argument
367         let handle = inode as Handle;  in opendir()
391         _handle: Self::Handle,  in releasedir()  argument
394         let handle = inode as Handle;  in releasedir()
409         _handle: Self::Handle,  in readdir()  argument
414         let handle = inode as Handle;  in readdir()