op.go
func Range(from, to int) OpFunc {
	return func(in []byte) ([]byte, error) {
		return scanner.FindRange(in, 0, from, to)
	}
}
func Range(from, to int) OpFunc {
	return func(in []byte) ([]byte, error) {
		return scanner.FindRange(in, 0, from, to)
	}
}
// Range extracts a selection of elements from the array provided, inclusive