140 pub struct MutexGuard<'a, T: ?Sized> {  struct
168 unsafe impl<T> Sync for MutexGuard<'_, T> where T: ?Sized + Send + Sync {}  implementation
207     check_send::<MutexGuard<'_, u32>>();  in bounds()
278     pub async fn lock(&self) -> MutexGuard<'_, T> {  in lock()
280         MutexGuard { lock: self }  in lock()
339     pub fn try_lock(&self) -> Result<MutexGuard<'_, T>, TryLockError> {  in try_lock()
341             Ok(_) => Ok(MutexGuard { lock: self }),  in try_lock()
454 impl<T: ?Sized> Drop for MutexGuard<'_, T> {  implementation
460 impl<T: ?Sized> Deref for MutexGuard<'_, T> {  implementation
467 impl<T: ?Sized> DerefMut for MutexGuard<'_, T> {  implementation
473 impl<T: ?Sized + fmt::Debug> fmt::Debug for MutexGuard<'_, T> {  implementation
479 impl<T: ?Sized + fmt::Display> fmt::Display for MutexGuard<'_, T> {  implementation