Errorf logs a message with format using the CRITICAL log level and returns an error containing the formatted log message.

Debug logs a message with format using the DEBUG log level.

Errorf logs a message with format using the ERROR log level and returns an error containing the formatted log message.

Info logs a message with format using the INFO log level.

SetBackend replaces the active log backend with the provided one.

Trace logs a message with format using the TRACE log level.

Warn logs a message with format using the WARN log level.