in src/main/java/com/google/cloud/run/kafkascaler/ScalingStabilizer.java [57:65]
private void setSelectorDebugString(Scaling.SelectPolicy selector) {
if (!selectorDebugString.isEmpty()) {
// This should never happen since it's only set once per scale up or scale down path and
// only one of those two paths should run, not both.
throw new IllegalStateException("Selector debug string already set.");
}
selectorDebugString = String.format("{Select: %s}", selector);
}