def notifyBefore(ob, action):
    """ Notify all applicable workflows of an action before it happens.

        o 'ob' is the content object which is the target of the action.

        o 'action' usually corresponds to a method name.

        o Participating workflows may veto the action by raising
          WorkflowException.

        o Unless vetoed, the tool will later call either a 'notifySuccess' or
          'notifyException'

        o Permission:  Private (Python only)
        """
