@Override
      public String description() {
        return "Waited over " + timeout + " ms for " + member + " to depart, but it didn't";
      }
wait for a member to leave the view. Throws an assertionerror if the timeout period elapses
before the member leaves
geode-dunit/src/main/java/org/apache/geode/distributed/internal/membership/api/MembershipManagerHelper.java