ret = location_manager_set_mock_location(manager, 10, 20, 0, 40, 50, 100);
fprintf(stderr, "location_manager_set_mock_location: %d\n", ret);
ret = location_manager_set_mock_location(manager, 10, 20, 0, 40, 50, 100);
fprintf(stderr, "location_manager_set_mock_location: %d\n", ret);