code: def get_identities(self, item):
          
  
          item = item['data']
          if 'owner' in item:
              owner = self.get_sh_identity(item['owner'])
              yield owner
          if 'user' in item:
              user = self.get_sh_identity(item['user'])
              yield user
          if 'mentor' in item:
              mentor = self.get_sh_identity(item['mentor'])
              yield mentor
docs: Return the identities from an item