Check checks whether the package was initialized.

Fatal produces a fatal error.

FatalChan returns a read-only channel that is closed when a fatal condition has occurred.

Init Initializes the package.

Shutdown closes the shutdown channel, thus informing channel drainers (usually the main goroutine) that the application should be cleanly shut down.

ShutdownChan returns a read-only channel that is closed when the application should be cleanly shut down.

FatalDelayInterval is the interval between when a package signals that a fatal event has occurred, and when drainers of the fatal channel are informed.

FatalGraceInterval is the time in which the main goroutine should shut the application down.