code: func (s *Series) GetLengthOk() (int, bool) {
  	if s == nil || s.Length == nil {
  		return 0, false
  	}
  	return *s.Length, true
  }
docs: // GetLengthOk returns a tuple with the Length field if it's non-nil, zero value otherwise
  // and a boolean to check if the value has been set.