Is the append aggregate action deprecated?

[Hecate0821]

I want to use append action to create nested list, what else processor can I look for?
To provide more context, for event:

{ "Merchant": "Peter", "ProductName": "Shoe", "Brand": "Nike" }
{ "Merchant": "Peter", "ProductName": "Cloth", "Brand": "Adidas" }

I want to make them:

{ "Merchant": "Peter", "ProductList":{
   "ProductName": "Shoe", "Brand": "Nike",
   "ProductName": "Cloth", "Brand": "Adidas"
   }
}

like mentioned in https://github.com/opensearch-project/data-prepper/tree/main/data-prepper-plugins/aggregate-processor#append

[dlvenable]

@Hecate0821 , No, the append action is not deprecated and should be available to use. Are you seeing a specific issue with using it?