util/treecache/treecache.go
func (zl ZookeeperLogger) Printf(s string, i ...interface{}) {
	level.Info(zl.logger).Log("msg", fmt.Sprintf(s, i...))
}
func (zl ZookeeperLogger) Printf(s string, i ...interface{}) {
	level.Info(zl.logger).Log("msg", fmt.Sprintf(s, i...))
}
func ( zl ZookeeperLogger ) Printf ( s string , i ... interface { } ) { level . Info ( zl . logger ) . Log ( " " , fmt . Sprintf ( s , i ... ) ) }
// Printf implements zk.Logger.
Printf implements zk . Logger .