static Map<ProcessId, Integer> clientTaskCount(final Map<ProcessId, ClientState> clientStateMap,
        final Function<ClientState, Integer> taskFunc) {
        return clientStateMap.entrySet().stream().collect(Collectors.toMap(Entry::getKey, v -> taskFunc.apply(v.getValue())));
    }
Builds a ProcessId with a UUID by repeating the given number n. For valid n, it is guaranteed that the returned UUIDs satisfy
the same relation relative to others as their parameter n does: iff n < m, then uuidForInt(n) < uuidForInt(m)
streams/src/test/java/org/apache/kafka/streams/processor/internals/assignment/AssignmentTestUtils.java