LevelFilter filters the log output based on its level.

NewLogger constructs a log.Logger based on the given format.

Sprint returns a log entry that is formatted using fmt.Sprint just before writing to the output.

Sprintf returns a log entry that is formatted using fmt.Sprintf just before writing to the output.

WithBaggage decorates the log.Logger with information form context.

WithContext decorates the log.Logger with information form context.

WithLevel decorates the logger and returns a contract.LevelLogger.

LevelLogger is an alias of contract.LevelLogger.