This annotation indicates that injection field or method supports
batching of updates.
Unlike regular updates that are processed right away, grouped updates
are performed at certain points, for instance, they could be processed
when the system gets in an idle state.
This is a performance improvement that can be used to eliminate extra updates
on the injected objects that don't have to track the changes exactly, but
rather only need to periodically catch up to the latest state of the injected variables.
Note that the order of batched events is unspecified and is likely different
from the original event order. As such, it is not recommended to use grouped updates on
the methods that modify other context values.