docs: public com.squareup.okhttp.Call getRouteOriginDestinationAsync(Integer destination, Integer origin,
              List<Integer> avoid, List<List<Integer>> connections, String datasource, String flag, String ifNoneMatch,
              final ApiCallback<List<Integer>> callback) throws ApiException {
  
          com.squareup.okhttp.Call call = getRouteOriginDestinationValidateBeforeCall(destination, origin, avoid,
                  connections, datasource, flag, ifNoneMatch, callback);
          Type localVarReturnType = new TypeToken<List<Integer>>() {
          }.getType();
          apiClient.executeAsync(call, localVarReturnType, callback);
          return call;
      }