code: func (t Typed) FloatsIf(key string) ([]float64, bool) {
  	value, exists := t[key]
  	if exists == false {
  		return nil, false
  	}
  	if n, ok := value.([]float64); ok {
  		return n, true
  	}
  	if a, ok := value.([]interface{}); ok {
  		l := len(a)
  		n := make([]float64, l)
  		for i := 0; i < l; i++ {
  			switch t := a[i].(type) {
  			case float64:
  				n[i] = t
  			case string:
  				f, err := strconv.ParseFloat(t, 10)
  				if err != nil {
  					return n, false
  				}
  				n[i] = f
  			default:
  				return n, false
  			}
  		}
  		return n, true
  	}
  	return nil, false
  }
docs: // Returns a float slice + true if valid
  // Returns nil + false otherwise
  // (returns nil+false if one of the values is not a valid float)