code: @SuppressWarnings("static-method")
      public void addOperationToGroup(String tag, String resourcePath, Operation operation, CodegenOperation co, Map<String, List<CodegenOperation>> operations) {
          String prefix =  co.returnBaseType != null && co.returnBaseType.contains(".")
                  ? co.returnBaseType.substring(0, co.returnBaseType.lastIndexOf("."))
                  : "";
  
          String newTag = !prefix.isEmpty()
                  ? prefix + "." + tag
                  : tag;
  
          super.addOperationToGroup(newTag, resourcePath, operation, co, operations);
      }
docs: Add operation to group
  
  @param tag name of the tag
  @param resourcePath path of the resource
  @param operation Swagger Operation object
  @param co Codegen Operation object
  @param operations map of Codegen operations