code: def getVerifier(self):
          
          wtool = getToolByName(self, 'portal_workflow')
          mtool = getToolByName(self, 'portal_membership')
  
          verifier = None
          # noinspection PyBroadException
          try:
              review_history = wtool.getInfoFor(self, 'review_history')
          except:  # noqa FIXME: remove blind except!
              return 'access denied'
  
          if not review_history:
              return 'no history'
          for items in review_history:
              action = items.get('action')
              if action != 'verify':
                  continue
              actor = items.get('actor')
              member = mtool.getMemberById(actor)
              verifier = member.getProperty('fullname')
              if verifier is None or verifier == '':
                  verifier = actor
          return verifier
docs: Returns the user that verified the whole Analysis Request. Since the
          verification is done automatically as soon as all the analyses it
          contains are verified, this function returns the user that verified the
          last analysis pending.