def _set_alarm_falling_event_index(self, v, load=False):
    """
    Setter method for alarm_falling_event_index, mapped from YANG variable /rmon/alarm_entry/alarm_falling_event_index (alarm-falling-event-index-type)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_alarm_falling_event_index is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_alarm_falling_event_index() directly.
    """
    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,base=RestrictedClassType(base_type=RestrictedClassType(base_type=long, restriction_dict={'range': ['-2147483648..2147483647']}, int_size=32), restriction_dict={'range': [u'1 .. 65535']}), is_leaf=True, yang_name="alarm-falling-event-index", rest_name="event", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'Event for falling alarm', u'alt-name': u'event'}}, namespace='urn:brocade.com:mgmt:brocade-rmon', defining_module='brocade-rmon', yang_type='alarm-falling-event-index-type', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """alarm_falling_event_index must be of a type compatible with alarm-falling-event-index-type""",
          'defined-type': "brocade-rmon:alarm-falling-event-index-type",
          'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=RestrictedClassType(base_type=long, restriction_dict={'range': ['-2147483648..2147483647']}, int_size=32), restriction_dict={'range': [u'1 .. 65535']}), is_leaf=True, yang_name="alarm-falling-event-index", rest_name="event", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'Event for falling alarm', u'alt-name': u'event'}}, namespace='urn:brocade.com:mgmt:brocade-rmon', defining_module='brocade-rmon', yang_type='alarm-falling-event-index-type', is_config=True)""",
        })

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