func FromNull() *Value {
	return &Value{value: nil}
}

// FromMissing creates a Value with Missing value
func FromMissing() *Value {
	return &Value{value: Missing{}}
}

// FromBytes creates a Value from a []byte
func FromBytes(b []byte) *Value {
	return &Value{value: b}
}

// FromArray creates a Value from an array of values.
func FromArray(a []Value) *Value {
	return &Value{value: a}
}

// Values should match if type is the same.
var valueBuilders = []func() *Value{
	FromNull,
	func() *Value {
		return FromBool(true)
	},
	func() *Value {
		return FromBytes([]byte("byte contents"))
	},
	func() *Value {
		return FromFloat(math.Pi)
	},
	func() *Value {
		return FromInt(0x1337)
	},
	func() *Value {
		t, err := time.Parse(time.RFC3339, "2006-01-02T15:04:05Z")

		}
		return FromFloat(float64(rval)), nil
	case bool:
		return FromBool(rval), nil
	case jstream.KVS:
		bs, err := json.Marshal(result)
		if err != nil {
			return nil, err
		}
		return FromBytes(bs), nil
	case []interface{}:
		dst := make([]Value, len(rval))
		for i := range rval {
			v, err := jsonToValue(rval[i])
			if err != nil {
				return nil, err
			}
			dst[i] = *v
		}