code: public OpenAPI downloadModel() throws Exception {
          String download = download();
          if (download != null) {
              try {
                  SwaggerParseResult parseResult = new OpenAPIParser().readContents(download, null, null, null);
                  if (parseResult != null) {
                      return parseResult.getOpenAPI();
                  }
              } catch (Exception e) {
                  Assert.fail(e.getMessage());
              }
              return null;
          }
          return null;
      }
docs: Downloads contents of URL and converts them to an OpenAPI model
  
  @return an OpenAPI model