@Override
      public boolean equals(Object o) {
        if (this == o) {
          return true;
        }
        if (!(o instanceof DeleteNodeFailSilent)) {
          return false;
        }

        return super.equals(o);
      }
ZKUtilOp representing deleteNodeFailSilent in ZooKeeper (attempt to delete node, ignore error
if node doesn't exist)
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java