ReadonlykindDiscriminator: the type is unknown.
ReadonlyrawThe value as received.
Optional ReadonlyseqThe received seq when it is a safe integer; absent otherwise (ephemeral events).
ReadonlytypeThe received type, or "" when it is missing or not a string.
An event whose
typethis SDK version does not know, or a value that is no event object. The caller skips it and keeps advancing its cursor (docs/spec/04-sync-protocol.md 7.1).