typed.go
func (t Typed) FloatsOr(key string, d []float64) []float64 {
	n, ok := t.FloatsIf(key)
	if ok {
		return n
	}
	return d
}
func (t Typed) FloatsOr(key string, d []float64) []float64 {
	n, ok := t.FloatsIf(key)
	if ok {
		return n
	}
	return d
}
// Returns an slice of floats, or the specified slice
// if the key doesn't exist or isn't a valid []float64