Does MemoryPack support custom formatter in unity? (see body)

[rollie42]

In unity section, there is:

Unity version does not support CustomFormatter.

The ambiguity is there is a section in the readme called "CustomFormatter", that only talks about MemoryPackCustomFormatterAttribute. In the next section ("Serialize external types"), you talk about creating custom formatters that extend from MemoryPackFormatter.

I assume Unity version doesn't support MemoryPackCustomFormatterAttribute — does it support MemoryPackFormatter?