Add new xcollection serializer

[mgrover1]

This is a first cut at adding an xcollection (collection of datasets) serializer to funnel - there is something going wrong here, in regards to serialization, so this is still a draft....

[mgrover1]

I found the culprit 😊 turns out this section was important

@pick_serializer.register(xc.Collection)
def _(obj):
    return registry.serializers.get('xcollection')().name

[andersy005]

I found the culprit 😊 turns out this section was important

@pick_serializer.register(xc.Collection)
def _(obj):
    return registry.serializers.get('xcollection')().name

I'm curious... This shouldn't be necessary when you explicitly specify the serializer to be xcollection. Were you using the auto serializer option before?

[mgrover1]

I found the culprit 😊 turns out this section was important

@pick_serializer.register(xc.Collection)
def _(obj):
    return registry.serializers.get('xcollection')().name

I'm curious... This shouldn't be necessary when you explicitly specify the serializer to be xcollection. Were you using the auto serializer option before?

It was using the auto serializer in the tests...

[andersy005]

Thank you, Max! This looks great 👍🏽