func (g *Group) GetEvaluationDuration() time.Duration {
	g.mtx.Lock()
	defer g.mtx.Unlock()
	return g.evaluationDuration
}
func (g *Group) GetEvaluationDuration() time.Duration {
	g.mtx.Lock()
	defer g.mtx.Unlock()
	return g.evaluationDuration
}
// GetEvaluationDuration returns the time in seconds it took to evaluate the rule group.