rules/recording.go
func NewRecordingRule(name string, vector promql.Expr, lset labels.Labels) *RecordingRule {
	return &RecordingRule{
		name:   name,
		vector: vector,
		health: HealthUnknown,
		labels: lset,
	}
}
func NewRecordingRule(name string, vector promql.Expr, lset labels.Labels) *RecordingRule {
	return &RecordingRule{
		name:   name,
		vector: vector,
		health: HealthUnknown,
		labels: lset,
	}
}
// NewRecordingRule returns a new recording rule.