Set log level to warn/error by default

[freeart]

Nodejs console prints INFO statistic messages every few seconds like

2019-08-05 10:54:28.285 INFO  ConsumerStatsImpl:64 | Consumer [persistent://public/default/xxx, reader-261478, 0] , ConsumerStatsImpl (numBytesRecieved_ = 0, totalNumBytesRecieved_ = 160101, receivedMsgMap_ = {}, ackedMsgMap_ = {}, totalReceivedMsgMap_ = {[Key: Ok, Value: 292], }, totalAckedMsgMap_ = {[Key: {Result: Ok, ackType: 1}, Value: 292], })

How to mute it or set log level to WARN or ERROR?
Is it possible to set from outside (js code)?

[freeart]

I found in src param "statsIntervalInSeconds" needs to be "0" to mute stats