I have grafana on sage and made a mage v2 query that works like a charm

group="platform_client" env="prod" event='all-requests-result'
serviceName='myServiceName' result="error" 
$customFilter | timechart limit=0 count by serviceName

But I don't like how it went with $customFilter variable. I made it "custom" type with values 1=1, | dedup ip. 1=1 is a crutch for "do not apply additional filters". Is there a more elegant way to do it?