GetFeatureFlagByName.
        [Preview API] Retrieve information on a single feature flag and its current states
        :param str name: The name of the feature to retrieve
        :param bool check_feature_exists: Check if feature exists
        :rtype: :class:`<FeatureFlag> <azure.devops.v5_0.feature_availability.models.FeatureFlag>`

def get_feature_flag_by_name(self, name, check_feature_exists=None):
        """GetFeatureFlagByName.
        [Preview API] Retrieve information on a single feature flag and its current states
        :param str name: The name of the feature to retrieve
        :param bool check_feature_exists: Check if feature exists
        :rtype: :class:`<FeatureFlag> <azure.devops.v5_0.feature_availability.models.FeatureFlag>`
        """
        route_values = {}
        if name is not None:
            route_values['name'] = self._serialize.url('name', name, 'str')
        query_parameters = {}
        if check_feature_exists is not None:
            query_parameters['checkFeatureExists'] = self._serialize.query('check_feature_exists', check_feature_exists, 'bool')
        response = self._send(http_method='GET',
                              location_id='3e2b80f8-9e6f-441e-8393-005610692d9c',
                              version='5.0-preview.1',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('FeatureFlag', response)