def _set_start_type(self, v, load=False):
    """
    Setter method for start_type, mapped from YANG variable /cfm_state/slm/slm_session_detail/start_type (start-stop-type)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_start_type is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_start_type() directly.

    YANG Description: Start 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'fixed': {'value': 1}, u'after': {'value': 2}, u'periodic': {'value': 3}},), is_leaf=True, yang_name="start-type", rest_name="start-type", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, namespace='urn:brocade.com:mgmt:brocade-dot1ag-operational', defining_module='brocade-dot1ag-operational', yang_type='start-stop-type', is_config=False)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """start_type must be of a type compatible with start-stop-type""",
          'defined-type': "brocade-dot1ag-operational:start-stop-type",
          'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'fixed': {'value': 1}, u'after': {'value': 2}, u'periodic': {'value': 3}},), is_leaf=True, yang_name="start-type", rest_name="start-type", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, namespace='urn:brocade.com:mgmt:brocade-dot1ag-operational', defining_module='brocade-dot1ag-operational', yang_type='start-stop-type', is_config=False)""",
        })

    self.__start_type = t
    if hasattr(self, '_set'):
      self._set()
Setter method for start_type, mapped from YANG variable /cfm_state/slm/slm_session_detail/start_type (start-stop-type)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_start_type is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_start_type() directly.

    YANG Description: Start type