code: def get_identities(self, item):
          
  
          item = item['data']
  
          # Changeset owner
          user = item['owner']
          identity = self.get_sh_identity(user)
          yield identity
  
          # Patchset uploader and author
          if 'patchSets' in item:
              for patchset in item['patchSets']:
                  user = patchset['uploader']
                  identity = self.get_sh_identity(user)
                  yield identity
                  if 'author' in patchset:
                      user = patchset['author']
                      identity = self.get_sh_identity(user)
                      yield identity
                  if 'approvals' in patchset:
                      # Approvals by
                      for approval in patchset['approvals']:
                          user = approval['by']
                          identity = self.get_sh_identity(user)
                          yield identity
  
          # Comments reviewers
          if 'comments' in item:
              for comment in item['comments']:
                  user = comment['reviewer']
                  identity = self.get_sh_identity(user)
                  yield identity
docs: Return the identities from an item