def _set_macsec_cipher_suite(self, v, load=False):
    """
    Setter method for macsec_cipher_suite, mapped from YANG variable /macsec/mka/policies/policy/config/macsec_cipher_suite (macsec-types:macsec-cipher-suite)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_macsec_cipher_suite is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_macsec_cipher_suite() directly.

    YANG Description: Set Cipher suite(s) for SAK derivation
    """
    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,unique=True, base=TypedListType(allowed_type=RestrictedClassType(base_type=six.text_type,                                     restriction_type="dict_key",                                     restriction_arg={'GCM_AES_128': {}, 'GCM_AES_256': {}, 'GCM_AES_XPN_128': {}, 'GCM_AES_XPN_256': {}},)), is_leaf=False, yang_name="macsec-cipher-suite", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, namespace='http://openconfig.net/yang/macsec', defining_module='openconfig-macsec', yang_type='macsec-types:macsec-cipher-suite', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """macsec_cipher_suite must be of a type compatible with macsec-types:macsec-cipher-suite""",
          'defined-type': "macsec-types:macsec-cipher-suite",
          'generated-type': """YANGDynClass(unique=True, base=TypedListType(allowed_type=RestrictedClassType(base_type=six.text_type,                                     restriction_type="dict_key",                                     restriction_arg={'GCM_AES_128': {}, 'GCM_AES_256': {}, 'GCM_AES_XPN_128': {}, 'GCM_AES_XPN_256': {}},)), is_leaf=False, yang_name="macsec-cipher-suite", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, namespace='http://openconfig.net/yang/macsec', defining_module='openconfig-macsec', yang_type='macsec-types:macsec-cipher-suite', is_config=True)""",
        })

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