code: public List<Object> initializePost(InitializeRequest request) throws ApiException {
          ApiResponse<List<Object>> resp = initializePostWithHttpInfo(request);
          return resp.getData();
      }
docs: Initialize Managed Entity&#39;s relationship by attribute name
  Hydrate relationship associated to that entity.
  @param request Initilize Relationship Request (required)
  @return List&lt;Object&gt;
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body