code: def skip(instance, action, peek=False, unskip=False):
      
  
      uid = callable(instance.UID) and instance.UID() or instance.UID
      skipkey = "%s_%s" % (uid, action)
      if 'workflow_skiplist' not in instance.REQUEST:
          if not peek and not unskip:
              instance.REQUEST['workflow_skiplist'] = [skipkey, ]
      else:
          if skipkey in instance.REQUEST['workflow_skiplist']:
              if unskip:
                  instance.REQUEST['workflow_skiplist'].remove(skipkey)
              else:
                  return True
          else:
              if not peek and not unskip:
                  instance.REQUEST["workflow_skiplist"].append(skipkey)
docs: Returns True if the transition is to be SKIPPED
  
          peek - True just checks the value, does not set.
          unskip - remove skip key (for manual overrides).
  
      called with only (instance, action_id), this will set the request variable preventing the
      cascade's from re-transitioning the object and return None.