AddLevel adds log level.

New creates logging hook for Stackdriver logging.

Set sets Stackdriver hook to global level logger.

SetLevels sets log levels.

SetLevelsAsDebug sets log level as Debug.

SetLevelsAsError sets log level as Error.

SetLevelsAsInfo sets log level as Info.

SetLevelsAsPanic sets log level as Panic.

SetLevelsAsWarn sets log level as Warn.

SetLogger sets Stackdriver hook to given logger.

Config is struct for Stackdriver's configuration.