Question: Is there a way to refer totalQuery via template variable in errorQuery

[Antiarchitect]

There are some cases in which errorQuery is calculated by substracting from total (bad = total - good) e.g.:

  errorQuery: >-
    (
      sum(rate(istio_request_duration_milliseconds_count{reporter="destination", destination_workload_namespace="dest", source_workload_namespace="src", request_protocol="http"}[{{.window}}]))
      -
      sum(rate(istio_request_duration_milliseconds_bucket{reporter="destination", destination_workload_namespace="dest", source_workload_namespace="src", request_protocol="http", le="10000"}[{{.window}}]))
    )
    OR on() vector(0)
  totalQuery: sum(rate(istio_request_duration_milliseconds_count{reporter="destination", destination_workload_namespace="dest", source_workload_namespace="src", request_protocol="http"}[{{.window}}])) OR on() vector(1)

It would be nice to be able to rewrite it this way:

  errorQuery: >-
    (
      {{.totalQuery}}
      -
      sum(rate(istio_request_duration_milliseconds_bucket{reporter="destination", destination_workload_namespace="dest", source_workload_namespace="src", request_protocol="http", le="10000"}[{{.window}}]))
    )
    OR on() vector(0)
  totalQuery: sum(rate(istio_request_duration_milliseconds_count{reporter="destination", destination_workload_namespace="dest", source_workload_namespace="src", request_protocol="http"}[{{.window}}])) OR on() vector(1)