promql/functions.go
func funcTime(vals []Value, args Expressions, enh *EvalNodeHelper) Vector {
	return Vector{Sample{Point: Point{
		V: float64(enh.ts) / 1000,
	}}}
}
func funcTime(vals []Value, args Expressions, enh *EvalNodeHelper) Vector {
	return Vector{Sample{Point: Point{
		V: float64(enh.ts) / 1000,
	}}}
}
// === time() float64 ===