private void expectRebalance(final Collection<String> revokedConnectors,
                                 final List<ConnectorTaskId> revokedTasks,
                                 final short error,
                                 final long offset,
                                 final List<String> assignedConnectors,
                                 final List<ConnectorTaskId> assignedTasks,
                                 int delay) {
        expectRebalance(revokedConnectors, revokedTasks, error, offset, "leader", "leaderUrl", assignedConnectors, assignedTasks, delay, false);
    }
Issues multiple rapid fencing requests for a handful of connectors, each of which takes a little while to complete.
This mimics what might happen when a few connectors are reconfigured in quick succession and each task for the
connector needs to hit the leader with a fencing request during its preflight check.
connect/runtime/src/test/java/org/apache/kafka/connect/runtime/distributed/DistributedHerderTest.java