public Collection<V> get(@ParametricNullness K key) {
    if (keyPredicate.apply(key)) {
      return unfiltered.get(key);
    } else if (unfiltered instanceof SetMultimap) {
      return new AddRejectingSet<>(key);
    } else {
      return new AddRejectingList<>(key);
    }
  }

  static class AddRejectingSet<K extends @Nullable Object, V extends @Nullable Object>
      extends ForwardingSet<V> {

	// Managed values.
	val          atomic.Pointer[T]
	lastUpdateMs atomic.Int64
	updating     sync.Mutex
}

// New allocates a new cached value instance. Tt must be initialized with
// `.TnitOnce`.
func New[T any]() *Cache[T] {
	return &Cache[T]{}
}

// NewFromFunc allocates a new cached value instance and initializes it with an
// update function, making it ready for use.

   *
   * <pre>
   *     String[] y = x.toArray(new String[0]);</pre>
   *
   * <p>Note that {@code toArray(new Object[0])} is identical in function to {@code toArray()}.
   *
   * @param a the array into which the elements of the queue are to be stored, if it is big enough;
   *     otherwise, a new array of the same runtime type is allocated for this purpose

  public final Entry<String, String>[] createArray(int length) {
    return (Entry<String, String>[]) new Entry<?, ?>[length];
  }

  @Override
  public final String[] createKeyArray(int length) {
    return new String[length];
  }

  @Override
  public final String[] createValueArray(int length) {
    return new String[length];
  }

  /** Returns the original element list, unchanged. */
  @Override

  }

  public static <T> Callable<T> callableThrowing(final Exception exception) {
    return new Callable<T>() {
      @Override
      public T call() throws Exception {
        throw exception;
      }
    };
  }

  private static Runnable runnableThrowing(final RuntimeException e) {
    return new Runnable() {
      @Override
      public void run() {
        throw e;
      }
    };
  }

      Comparator<K0> comparator) {
    checkNotNull(comparator);
    return new MultimapBuilderWithKeys<K0>() {
      @Override
      <K extends K0, V extends @Nullable Object> Map<K, Collection<V>> createMap() {
        return new TreeMap<>(comparator);
      }
    };
  }

  /**
   * Uses an {@link EnumMap} to map keys to value collections.
   *

     */
    public static byte[] decode(String string) {
        int length = string.length();
        if (length == 0) return new byte[0];
        int pad = (string.charAt(length - 2) == '=') ? 2 :
                (string.charAt(length - 1) == '=') ? 1 : 0;
        int size = length * 3 / 4 - pad;
        byte[] buffer = new byte[size];
        int block;
        int i = 0;
        int index = 0;
        while (i < length) {

        Files.writeString(envPath, "foo=bar-env\nfoo-env=bar\n");

        Properties p = new Properties();
        p.put("user.home", userDirectory.toString());
        MavenPropertiesLoader.loadProperties(p, mavenUserProps, p::getProperty, false);
        assertEquals("bar", p.getProperty("foo"));
        assertNull(p.getProperty("foo-env"));

        p = new Properties();
        p.put("user.home", userDirectory.toString());

    private ModelVersionParser versionParser = new DefaultModelVersionParser(new GenericVersionScheme());

    private Version newVersion(String version) {
        return versionParser.parseVersion(version);
    }

    private VersionRange parseValid(String range) {
        try {
            return versionParser.parseVersionRange(range);
        } catch (VersionParserException e) {

local g = import './g.libsonnet';
local var = g.dashboard.variable;

{
  datasource:
    var.datasource.new('datasource', 'prometheus'),

  cluster:
    var.query.new('cluster')
    + var.query.withDatasourceFromVariable(self.datasource)
    + var.query.queryTypes.withLabelValues(
      'cluster',
      'process_cpu_seconds_total',
    )
    + var.query.withRefresh('time')
    + var.query.selectionOptions.withMulti()