/**
  * Determine Form Display for that should be used for a submission
  *
  * @param \Drupal\eform\Entity\EFormSubmission $eform_submission
  *
  * @return string
  *  Id for Form Display Mode
  */
 function getFormMode(EFormSubmission $eform_submission) {
   if ($eform_submission->isDraft()) {
     return 'submit_draft';
   }
   if ($eform_submission->isNew()) {
     return 'submit';
   }
   else {
     return 'submit_previous';
   }
 }