Trait slog_term::ThreadSafeTimestampFn

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pub trait ThreadSafeTimestampFn: Fn(&mut dyn Write) -> Result<()> + Send + Sync + UnwindSafe + RefUnwindSafe + 'static { }
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Threadsafe timestamp formatting function type

To satify slog-rs thread and unwind safety requirements, the bounds expressed by this trait need to satisfied for a function to be used in timestamp formatting.

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impl<F> ThreadSafeTimestampFn for F
where F: Fn(&mut dyn Write) -> Result<()> + Send + Sync + UnwindSafe + RefUnwindSafe + 'static + ?Sized,