Debug logs a debug message in the global logger.

Debugf logs a formatted debug message in the global logger.

Error logs an error in the global logger.

Errorf logs a formatted error in the global logger.

Info logs an info message in the global logger.

Infof logs a formatted info message in the global logger.

New returns a new WLogger, which uses a writer to write the messages.

LevelDebug is used for debug messages.

LevelError is used for error messages.

LevelInfo is used for informational messages.

NilLogger is a nil implementation of the Logger interface.

WLogger implements the WLogger interface using a Writer to log to.

Logger defines an interface for logging messages.

NowFunc is a type of function that returns a time.