Asks CUBE for one feed, live, and adopts it into the roster: the way a
feed shared to this identity, or made public, since the roster was
walked is seen when it is asked for by name or id. A feed the roster
already holds has its row refreshed. The yardsticks move with an
adoption, so the next delta does not walk again for what this ask found.
The feed as the roster now holds it, or null when CUBE lists it
in neither collection for this identity — not shared, or shared to a
group the identity is not in.
Asks CUBE for one feed, live, and adopts it into the roster: the way a feed shared to this identity, or made public, since the roster was walked is seen when it is asked for by name or id. A feed the roster already holds has its row refreshed. The yardsticks move with an adoption, so the next delta does not walk again for what this ask found.