# Functions
NewContextCanceledError returns a new `ContextCanceledError` instance.
Notifier registers a handler for receiving signals from the OS.
NotifierWithContext does the same as `Notifier`, but if the given `ctx` becomes `Done`, the notification is stopped.
# Structs
ContextCanceledError contains a signal to pass through when the context is cancelled.
# Type aliases
NotifyFunc is a callback function for Notifier.