Whether the timeline was empty before the marker event arrived in the
room. This could be happen in a variety of cases:
From the initial sync
It's the first state we're seeing after joining the room
Or whether it's coming from syncFromCache
A marker event refers to UNSTABLE_MSC2716_MARKER and indicates that
history was imported somewhere back in time. It specifically points to an
MSC2716 insertion event where the history was imported at. Marker events
are sent as state events so they are easily discoverable by clients and
homeservers and don't get lost in timeline gaps.
Whether the timeline was empty before the marker event arrived in the room. This could be happen in a variety of cases:
syncFromCacheA marker event refers to
UNSTABLE_MSC2716_MARKERand indicates that history was imported somewhere back in time. It specifically points to an MSC2716 insertion event where the history was imported at. Marker events are sent as state events so they are easily discoverable by clients and homeservers and don't get lost in timeline gaps.