@Override
    public boolean equals(Object o) {
      if (o == null) {
        return false;
      }
      if (!(o instanceof PoisonedKey)) {
        return false;
      }
      PoisonedKey po = (PoisonedKey) o;
      if (k == null) {
        return po.k == null;
      }
      return k.equals(po.k);
    }
Accessed via reflection

@return true if poison found
geode-core/src/distributedTest/java/org/apache/geode/cache30/PartitionedRegionDUnitTest.java