Nones in metainfo

I find myself writing a lot of these kind of statements in the parser:

if out["program_name"] is not None:
    section_run.program_name = out["program_name"]

This prevents me from saving None into the metainfo (this is allowed, but will cause problems when the archive is serialized as JSON+msgpack don't like these values).

Is there a valid use case for explicitly storing None into some metainfo value? Or could we modify the metainfo so that if a None is given as a section or quantity, nothing is by default inserted? We can of course also define some helper insertion function that will skip saving Nones, but I think it would be cleaner if this can be solved on the metainfo-package level.