log.go
func (l *slog) SetLevel(level Level) {
	atomic.StoreUint32((*uint32)(&l.lvl), uint32(level))
}
func (l *slog) SetLevel(level Level) {
	atomic.StoreUint32((*uint32)(&l.lvl), uint32(level))
}
// SetLevel changes the logging level to the passed level.
//
// This is part of the Logger interface implementation.