*       other words, {@code ContiguousSet.create(a.canonical(domain), domain).equals(
   *       ContiguousSet.create(a, domain))}
   *   <li>uniqueness: unless {@code a.isEmpty()}, {@code ContiguousSet.create(a,
   *       domain).equals(ContiguousSet.create(b, domain))} implies {@code
   *       a.canonical(domain).equals(b.canonical(domain))}

        } finally {
            envMap.remove("COMPUTERNAME");
        }
    }

    @Test
    public void test_getInstanceId_uniquePerProcess() {
        // Verify that instanceId contains PID for process uniqueness
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public String getSchedulerTargetName() {

        }
        return "Unknown";
    }

    /**
     * Gets the instance ID for this Fess instance.
     * Combines scheduler.target.name (if configured), hostname, and PID
     * to ensure uniqueness across multiple JVMs on the same host.
     *
     * @return The instance ID.
     */
    public String getInstanceId() {
        final String targetName = ComponentUtil.getFessConfig().getSchedulerTargetName();

    @Test
    @DisplayName("Should verify all fault code constants are unique")
    void testFaultCodesUniqueness() {
        Set<Integer> faultCodes = new HashSet<>();

        // Add all fault codes to a set to check uniqueness
        faultCodes.add(DcerpcError.DCERPC_FAULT_OTHER);
        faultCodes.add(DcerpcError.DCERPC_FAULT_ACCESS_DENIED);
        faultCodes.add(DcerpcError.DCERPC_FAULT_CANT_PERFORM);

// shapes in `y`.
// The partial derivatives are returned in `dy`. `dy` should be allocated to
// size `nx`.
//
// Gradient nodes are automatically named under the "gradients/" prefix. To
// guarantee name uniqueness, subsequent calls to the same graph will
// append an incremental tag to the prefix: "gradients_1/", "gradients_2/", ...
// See TF_AddGradientsWithPrefix, which provides a means to specify a custom

        return;
      }
      // We have a convoluted scheme here: Using the C++ graph construction API
      // to add potentially many nodes to the graph without running the checks
      // (such as uniqueness of the names of nodes) we run with other functions
      // that add a node to the graph (like TF_FinishOperation).
      if (!g->name_map.insert(std::make_pair(n->name(), n)).second) {

- Introduced a new declarative validation tag `+k8s:customUnique` to control listmap uniqueness. ([#134279](https://github.com/kubernetes/kubernetes/pull/134279), [@yongruilin](https://github.com/yongruilin)) [SIG API Machinery and Auth]

  - Added an additional identifier to `ResourceClaim.Status` for the device supports multiple allocations.

- Fixed missing validation of uniqueness of list items in lists with `x-kubernetes-list-type: map` or `x-kubernetes-list-type: set` in CustomResources. ([#84920](https://github.com/kubernetes/kubernetes/pull/84920), [@sttts](https://github.com/sttts)) [SIG API Machinery]

- Certificate handling improvements:
  - Renew certs as part of upgrade.
  - New `kubeadm alpha phase certs renew` command for renewing certificates.
  - Certificates created with kubeadm now have improved uniqueness of Distinguished Name fields.
- HA improvements:
  - `kubeadm join --experimental-control-plane` can now be used to join control plane instances to an existing cluster.