code: func (a *Args) GetUfloatOrZero(key string) float64 {
  	f, err := a.GetUfloat(key)
  	if err != nil {
  		f = 0
  	}
  	return f
  }
docs: // GetUfloatOrZero returns ufloat value for the given key.
  //
  // Zero (0) is returned on error.