An externally-requested selection (e.g. a "jump to this object" button
elsewhere in a host app) — a body id plus a token that changes on every
request, even a repeat of the same id, so requesting a focus on X again
while already there still re-flies the camera there instead of being a
no-op. system is switched by the CALLER before/alongside this (this
component only knows about whatever system it's currently given).
An externally-requested selection (e.g. a "jump to this object" button elsewhere in a host app) — a body id plus a token that changes on every request, even a repeat of the same id, so requesting a focus on X again while already there still re-flies the camera there instead of being a no-op.
systemis switched by the CALLER before/alongside this (this component only knows about whateversystemit's currently given).