Mongo query in nested object of object

I am using spring and mongo data JPA. I have a document which has following nested structure

I want to search all the documents where any one of the renderMap.propBindings._class = "packagename.classname". How do I do this?

I tried -

{renderMap: {$elemMatch: {propBindings: {$elemMatch: {_class: "packagename.classname"}}}}}

and

{renderMap.propBindings._class: "packagename.classname"}

But it didnt work. Thanks