A question about the context "Add..." functionality

[GrimblyGorn]

I noticed earlier that some nodes have various Input/Output options for auto-generating associated nodes to pair with them. Such as the CheckpointLoader with its "Add LORA" option. This seems very handy for my previously linked modified sampler nodes which have many input nodes required. But, I haven't been able to locate how that was implemented, so I'm uncertain how to go about adding that functionality to these custom nodes now.

Ideally, I could have 1 entry for each Input and possibly a custom entry for "Add ALL" or something like that :)

Any insight on this would be helpful and appreciated.