When I use TypedCommand, any BSONObjs in my request struct are not parsed in owned manner (e.g. here). This means that I cannot hold onto these objects after the command finishes running. I need to explicitly call `getOwned` on these objects to make them outlive command execution. While I can do this, this is brittle, I need to make sure to do this for all BSONObjs in all my request structs. It'd be great if TypedCommand instead parsed the incoming BSONObjs in owned manner.