Returns the Fact with the minimum value in a metric or KPI FactList. If there are no Facts in the list or all of the Facts contain null or NaN values return a MissingFact which has no data and not breakdown. The MissingFact is a special case of a Fact object that can be useful to simplify defensive coding checks.
// get the quickest response time
var quickest = metrics.get('response time').getMinimum();
// return the value and the breakdown