A MetricRange is used when each window is good when the value x of
a single TimeSeries satisfies range.min <= x < range.max. The
provided TimeSeries must have ValueType = INT64 or ValueType
= DOUBLE and MetricKind = GAUGE.
.. attribute:: time_series
A monitoring filter
<https://cloud.google.com/monitoring/api/v3/filters>__
specifying the TimeSeries to use for evaluating window
quality.