New returns a new instance a types.Logger based on glog.

NewEmitter returns a new instance of a types.Emitter based on the global instance of glog (the upstream glog does not have a non-global instance, unfortunately).

SeverityFromLevel converts logger.Level to Severity.

GLog is a types.Emitter implementation based on glog.

EntryPropertyAlsoStderr is types.EntryProperty which makes the entry be also printed to stderr.

Severity is the internal glog's logging level.