static Cluster getClusterForAllTopics() {
        return new Cluster(
            "cluster",
            mkSet(NODE_0, NODE_1, NODE_2, NODE_3, NODE_4),
            mkSet(
                PI_0_0,
                PI_0_1,
                PI_0_2,
                PI_0_3,
                PI_0_4,
                PI_0_5,
                PI_0_6,
                PI_1_0,
                PI_1_1,
                PI_1_2,
                PI_1_3,
                PI_2_0,
                PI_2_1,
                PI_2_2,
                PI_2_3,
                PI_3_0,
                PI_3_1,
                PI_3_2
            ),
            Collections.emptySet(),
            Collections.emptySet()
        );
    }
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