Whether a captured channel is assigned to the main mix. A channel feeds main by
default, so an absent ChannelSnapshotJson.toMain reads true; only an
explicit false (a channel routed solely through its subgroups) keeps it out.
The channel-side mirror of subgroupFeedsMain.
Whether a captured channel is assigned to the main mix. A channel feeds main by default, so an absent ChannelSnapshotJson.toMain reads
true; only an explicitfalse(a channel routed solely through its subgroups) keeps it out. The channel-side mirror of subgroupFeedsMain.