def _set_vcs(self, v, load=False):
    """
    Setter method for vcs, mapped from YANG variable /event_handler/event_handler_list/trigger/vcs (enumeration)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_vcs is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_vcs() directly.

    YANG Description: VCS event type.
    """
    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'switch-bootup': {'value': 1}, u'switch-ready-for-configuration': {'value': 2}},), is_leaf=True, yang_name="vcs", rest_name="vcs", parent=self, choice=(u'trigger-choice', u'vcs'), path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'VCS event type.'}}, namespace='urn:brocade.com:mgmt:brocade-event-handler', defining_module='brocade-event-handler', yang_type='enumeration', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """vcs must be of a type compatible with enumeration""",
          'defined-type': "brocade-event-handler:enumeration",
          'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'switch-bootup': {'value': 1}, u'switch-ready-for-configuration': {'value': 2}},), is_leaf=True, yang_name="vcs", rest_name="vcs", parent=self, choice=(u'trigger-choice', u'vcs'), path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'VCS event type.'}}, namespace='urn:brocade.com:mgmt:brocade-event-handler', defining_module='brocade-event-handler', yang_type='enumeration', is_config=True)""",
        })

    self.__vcs = t
    if hasattr(self, '_set'):
      self._set()