Debug logs a DEBUG logging line.

Fatalf is equivalent to Printf() followed by a call to os.Exit(1).

Fatalln is equivalent to Println() followed by a call to os.Exit(1).

Info logs an INFO logging line.

Print calls logger.Output to print to the logger without any labels.

Printf calls logger.Output to print to the logger without any labels.

Println calls logger.Output to print to the logger without any labels.

SetLevel sets the logging level.

SetOutput sets the output to a new io.Writer object.

Logger represents a custom logging object.