moment.tz.filterLinkPack(UnpackedBundle, Number, Number); // PackedBundle
The packing, link creation, and subsetting of years are all tools for compressing data to be transported to the client.
moment.tz.filterLinkPack method combines all these into one simple interface.
Pass in an unpacked bundle, start year, and end year and get a filtered, linked, packed bundle back.
This is what is being used to compress the output for the bundled data + library files on the homepage.