code: public Stat setACL(final String path, List<ACL> acl, int version)
              throws KeeperException, InterruptedException {
          verbotenThreadCheck();
          final String clientPath = path;
          PathUtils.validatePath(clientPath);
  
          final String serverPath = prependChroot(clientPath);
  
          RequestHeader h = new RequestHeader();
          h.setType(ZooDefs.OpCode.setACL);
          SetACLRequest request = new SetACLRequest();
          request.setPath(serverPath);
          if (acl != null && acl.size() == 0) {
              throw new KeeperException.InvalidACLException();
          }
          request.setAcl(acl);
          request.setVersion(version);
          SetACLResponse response = new SetACLResponse();
          ReplyHeader r = cnxn.submitRequest(h, request, response, null);
          if (r.getErr() != 0) {
              throw KeeperException.create(KeeperException.Code.get(r.getErr()),
                      clientPath);
          }
          return response.getStat();
      }
docs: Set the ACL for the node of the given path if such a node exists and the
  given version matches the version of the node. Return the stat of the
  node.
  <p>
  A KeeperException with error code KeeperException.NoNode will be thrown
  if no node with the given path exists.
  <p>
  A KeeperException with error code KeeperException.BadVersion will be
  thrown if the given version does not match the node's version.
  
  @param path
  @param acl
  @param version
  @return the stat of the node.
  @throws InterruptedException
  If the server transaction is interrupted.
  @throws KeeperException
  If the server signals an error with a non-zero error code.
  @throws org.apache.zookeeper_voltpatches.KeeperException.InvalidACLException
  If the acl is invalide.
  @throws IllegalArgumentException
  if an invalid path is specified