Data extracted for a specific group based on certain filter criteria,
such as a given time period and/or service filter.
Approximate total number of events in the given group that
match the filter criteria.
Approximate number of occurrences over time. Timed counts
returned by ListGroups are guaranteed to be: - Inside the
requested time interval - Non-overlapping, and - Ordered by
ascending time.
Approximate last occurrence that was ever seen for this group
and which matches the given filter criteria, ignoring the
time_range that was specified in the request.
The total number of services with a non-zero error count for
the given filter criteria.
