MembersOf is now MessagePack's StandardResolver write set: public fields and
properties with a public getter, none of them [IgnoreMember]. UnreadKeyedMembers
(renamed from NonPublicKeyedMembers) is every other [Key] member, including a
public property whose getter is private. IdProblem takes id candidates from every
instance member up the base chain, refuses an id MessagePack does not write, and
refuses a property id with a non-public setter, which MessagePack writes but does
not read back (s4: walk-member-set-differs, private-setter-id-dropped-on-read).
An oracle test pins the member set to MessagePack's ObjectSerializationInfo.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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