type TryLockResult<Guard> = Result<Guard, TryLockError<Guard>>;
A type alias for the result of a nonblocking locking method.
For more information, see LockResult. A TryLockResult doesn't necessarily hold the associated guard in the Err type as the lock may not have been acquired for other reasons.
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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/sync/type.TryLockResult.html