Get the (capped) number of unread notification groups for the current user. A notification is
considered unread if it is more recent than the notifications read marker. Because the count
is dependant on the parameters, it is computed every time and is thus a relatively slow
operation (although faster than getting the full corresponding notifications), therefore the
number of returned notifications is capped.
Get the (capped) number of unread notification groups for the current user. A notification is considered unread if it is more recent than the notifications read marker. Because the count is dependant on the parameters, it is computed every time and is thus a relatively slow operation (although faster than getting the full corresponding notifications), therefore the number of returned notifications is capped.