Can't overload job in variable of kafka-mixin/dashboards/kafka-lag-overview.libsonnet

[serg-sno]

I try to change the job filter in variables of kafka-lag-overview dashboard using _config:

_config+:: {
  kafkaFilteringSelector: 'job="prometheus-kafka-exporter"',
},

It works for Kafka alerts but not for dashboards. How can I replace kafkaFilteringSelector for dashboards?