except from the review of SERVER-115196:

Comment on line R54:

 LogicalAggStageAPI(::MongoExtensionLogicalAggStage* ptr) 

cswanson310 commented:

Did you consider or take a stab at deleting this type of constructor? [without a required ObservabilityContext] Unit tests complain? Could we perhaps file a ticket to do that?

I guess I'm open to an argument that these should always exist, but it feels safer to have the only API make developers think about whether/how they want to track metrics through this API call?

finleylau replied 

Unit tests would definitely complain. I was thinking about the metrics being optional, as the SDK currently does not have any metrics. I don't feel strongly either way and would be down to filing a followup ticket to remove these constructors + update unit tests