private ImmutableNetwork(Network<N, E> network) {
    super(
        NetworkBuilder.from(network), getNodeConnections(network), getEdgeToReferenceNode(network));
  }

  /** Returns an immutable copy of {@code network}. */
  public static <N, E> ImmutableNetwork<N, E> copyOf(Network<N, E> network) {
    return (network instanceof ImmutableNetwork)
        ? (ImmutableNetwork<N, E>) network

Without a data validation system, you would have to do all the checks by hand, in code.

These features are what Marshmallow was built to provide. It is a great library, and I have used it a lot before.

But it was created before there existed Python type hints. So, to define every <abbr title="the definition of how data should be formed">schema</abbr> you need to use specific utils and classes provided by Marshmallow.

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value: "{{ $val }}" {{- end }} {{- range $key, $value := .Values.meshConfig.defaultConfig.proxyMetadata }} - name: {{ $key }} value: "{{ $value }}" {{- end }} {{- $network_set := index $gateway.env "ISTIO_META_NETWORK" }} {{- if and (not $network_set) .Values.global.network }} - name: ISTIO_META_NETWORK value: "{{ .Values.global.network }}" {{- end }} - name: ISTIO_META_CLUSTER_ID value: "{{ $.Values.global.multiCluster.clusterName | default `Kubernetes` }}" - name: ISTIO_META_NODE_NAME valueFrom:...

                      description: The locality associated with the endpoint.
                      type: string
                    network:
                      description: Network enables Istio to group endpoints resident
                        in the same L3 domain/network.
                      type: string
                    ports:
                      additionalProperties:

under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work.  The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.

  14. Revised Versions of this License.

   * are running concurrently.
   *
   * <p>{@linkplain Executor#execute executed} tasks have a happens-before order as defined in the
   * Java Language Specification. Tasks execute with the same happens-before order that the function
   * calls to {@link Executor#execute `execute()`} that submitted those tasks had.
   *

      # have a shared root CA for this model to work.
      enabled: false
      # Should be set to the name of the cluster this installation will run in. This is required for sidecar injection
      # to properly label proxies
      clusterName: ""

    # Network defines the network this cluster belong to. This name
    # corresponds to the networks in the map of mesh networks.
    network: ""

  the system can't tell whether it has access to the network required by these
  operations.

  Offline mode really means anticipating a lack of network connectivity, and as
  a result turning off certain services provided by m2 and providing a coherent
  way of predicting and reporting when network-related failures will take place.
  It means warning users that since the network is missing, certain features and

      # have a shared root CA for this model to work.
      enabled: false
      # Should be set to the name of the cluster this installation will run in. This is required for sidecar injection
      # to properly label proxies
      clusterName: ""
    # Network defines the network this cluster belong to. This name
    # corresponds to the networks in the map of mesh networks.
    network: ""