code: public ApiResponse<Void> saveRelationshipsPostWithHttpInfo(SaveRelationshipRequest request) throws ApiException {
          com.squareup.okhttp.Call call = saveRelationshipsPostValidateBeforeCall(request, null, null);
          return apiClient.execute(call);
      }
docs: Bulk Save Relationships
  This is used to batch save an entity&#39;s relationship in order to offer more throughput than persisting.
  @param request Save Relationships Request (required)
  @return ApiResponse&lt;Void&gt;
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body