This can be very useful for setting up **resources** that you need to use for the whole app, and that are **shared** among requests, and/or that you need to **clean up** afterwards. For example, a database connection pool, or loading a shared machine learning model.

## Use Case { #use-case }

Let's start with an example **use case** and then see how to solve it with this.

    client =
      client
        .newBuilder()
        // Since this test knowingly leaks a connection, avoid using the default shared connection
        // pool, which should remain clean for subsequent tests.
        .connectionPool(ConnectionPool())
        .addNetworkInterceptor(
          Interceptor { chain: Interceptor.Chain? ->
            val response =
              chain!!.proceed(

                names = Stream.concat(phases.stream(), goals.stream()).toList();
            } catch (LookupException e) {
                names = List.of(
                        "clean",
                        "validate",
                        "compile",
                        "test",
                        "package",
                        "verify",
                        "install",

    return ListTestSuiteBuilder.using(
            new TestStringListGenerator() {
              @Override
              public List<String> create(String[] elements) {
                return asList(elements.clone());
              }
            })
        .named("Arrays.asList")
        .withFeatures(
            ListFeature.SUPPORTS_SET,
            CollectionFeature.SERIALIZABLE,

    return ListTestSuiteBuilder.using(
            new TestStringListGenerator() {
              @Override
              public List<String> create(String[] elements) {
                return asList(elements.clone());
              }
            })
        .named("Arrays.asList")
        .withFeatures(
            ListFeature.SUPPORTS_SET,
            CollectionFeature.SERIALIZABLE,

		listServiceAccounts = true
	default:
		err := errors.New("invalid list type")
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrInvalidRequest, err), r.URL)
		return
	}

	s := globalServerConfig.Clone()
	roleArnMap := make(map[string]string)
	// Map of configs to a map of users to their access keys
	cfgToUsersMap := make(map[string]map[string]madmin.OpenIDUserAccessKeys)

config.loadingScreen)):(o.switchTab("#"+s),f.fadeOut())}))}else this.switchTab("#"+s);this.onTabCreated(n.default("#"+s))},t.openTabSidebar=function(e,t){void 0===t&&(t=this._config.autoShowNewTab);var a=n.default(e).clone();void 0===a.attr("href")&&(a=n.default(e).parent("a").clone()),a.find(".right, .search-path").remove();var i=a.find("p").text();""===i&&(i=a.text());var o=a.attr("href");if("#"!==o&&""!==o&&void 0!==o){var l=unescape(o).replace("./","").replace(/["#&'./:=?[\]]/gi,"-").replace...

	return &KMS{
		Type:           Builtin,
		DefaultKey:     defaultKeyName,
		latencyBuckets: defaultLatencyBuckets,
		latency:        make([]atomic.Uint64, len(defaultLatencyBuckets)),
		conn: &StubKMS{
			KeyNames: []string{defaultKeyName},
		},
	}
}

// StubKMS is a KMS implementation for tests
type StubKMS struct {
	KeyNames []string
}

// Version returns the type of the KMS.

        .asList()
        .containsExactlyElementsIn(asList(expected.getBounds()))
        .inOrder();
  }

  /**
   * Working with arrays requires defensive code. Verify that we clone the type array for both input
   * and output.
   */
  public void testNewParameterizedTypeImmutability() {
    Type[] typesIn = {String.class, Integer.class};

		}

		if err := tx.Find(reflectResults.Addr().Interface()).Error; err != nil {
			return err
		}
	}

	fieldValues := make([]interface{}, len(relForeignFields))

	// clean up old values before preloading
	switch reflectValue.Kind() {
	case reflect.Struct:
		switch rel.Type {
		case schema.HasMany, schema.Many2Many: