code: public function setFeedSubmissionInfoList($feedSubmissionInfo)
      {
          if (!$this->_isNumericArray($feedSubmissionInfo)) {
              $feedSubmissionInfo = array($feedSubmissionInfo);
          }
          $this->fields['FeedSubmissionInfo']['FieldValue'] = $feedSubmissionInfo;
          return $this;
      }
docs: Sets the value of the FeedSubmissionInfo.
  
  @param mixed $feedSubmissionInfo FeedSubmissionInfo or an array of FeedSubmissionInfo FeedSubmissionInfo
  @return $this This instance