original_string: protected function getValidFromDate($fieldSource, $fieldName, $prevRoundId, \Gems_Tracker_Token $token, \Gems_Tracker_RespondentTrack $respTrack)
      {
          return $this->getValidUntilDate($fieldSource, $fieldName, $prevRoundId, $token, $respTrack, false);
      }
code: protected function getValidFromDate($fieldSource, $fieldName, $prevRoundId, \Gems_Tracker_Token $token, \Gems_Tracker_RespondentTrack $respTrack)
      {
          return $this->getValidUntilDate($fieldSource, $fieldName, $prevRoundId, $token, $respTrack, false);
      }
code_tokens: protected function getValidFromDate ( $ fieldSource , $ fieldName , $ prevRoundId , \ Gems_Tracker_Token $ token , \ Gems_Tracker_RespondentTrack $ respTrack ) { return $ this -> getValidUntilDate ( $ fieldSource , $ fieldName , $ prevRoundId , $ token , $ respTrack , false ) ; }
docstring: Returns the date to use to calculate the ValidFrom if any
  
  @param string $fieldSource Source for field from round
  @param string $fieldName Name from round
  @param int $prevRoundId Id from round
  @param \Gems_Tracker_Token $token
  @param \Gems_Tracker_RespondentTrack $respTrack
  @return \MUtil_Date date time or null
docstring_tokens: Returns the date to use to calculate the ValidFrom if any