There are several references using $[...]
syntax in the serverless-plugin-aws-alerts docs: Serverless Framework: Plugins
I understand about ${…} variables from the relevant docs: Serverless Framework Variables
But I can’t find anything to describe what is happening in the below code snippet (taken from the aws-alerts plugin docs linked above)
nameTemplate: $[functionName]-Duration-IMPORTANT-Alarm # Optionally - naming template for the alarms, overwrites globally defined one
prefixTemplate: $[stackName] # Optionally - override the alarm name prefix, overwrites globally defined one
...