private final CountDownLatch returned = new CountDownLatch(1);
    private Object proxy;

    @SuppressWarnings("unchecked") // proxy for a generic class
    <V> Callable<V> waitFor(Callable<V> callable) {
      return waitFor(callable, Callable.class);
    }

    @SuppressWarnings("unchecked") // proxy for a generic class
    <V> ClosingCallable<V> waitFor(ClosingCallable<V> closingCallable) {

		return nil
	}
	if *schema.XListType != "set" && *schema.XListType != "map" {
		return nil
	}

	// set and map list items cannot be nullable
	if schema.Items.Schema.Nullable {
		allErrs = append(allErrs, field.Forbidden(fldPath.Child("items").Child("nullable"), "cannot be nullable when x-kubernetes-list-type is "+*schema.XListType))
	}

	switch *schema.XListType {
	case "map":

   *
   * @since 2.0
   */
  public static class Builder<K, V> extends ImmutableMap.Builder<K, V> {
    private transient @Nullable Object[] keys;
    private transient @Nullable Object[] values;
    private final Comparator<? super K> comparator;

    /**
     * Creates a new builder. The returned builder is equivalent to the builder generated by {@link

  public void testToStringImplWithNullKeys() throws Exception {
    Map<@Nullable String, String> hashmap = Maps.newHashMap();
    hashmap.put("foo", "bar");
    hashmap.put(null, "baz");

    assertEquals(hashmap.toString(), Maps.toStringImpl(hashmap));
  }

  public void testToStringImplWithNullValues() throws Exception {
    Map<String, @Nullable String> hashmap = Maps.newHashMap();
    hashmap.put("foo", "bar");

                List<File> pomFiles,
                Set<File> aggregatorFiles,
                boolean root,
                boolean recursive) {
            List<Callable<InterimResult>> tasks = pomFiles.stream()
                    .map(pomFile -> ((Callable<InterimResult>)
                            () -> build(projectIndex, pomFile, concat(aggregatorFiles, pomFile), root, recursive)))
                    .collect(Collectors.toList());

import java.util.function.Consumer;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.Collectors;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A {@link NavigableMap} whose contents will never change, with many other important properties
 * detailed at {@link ImmutableCollection}.
 *

   */
  interface Trusted<V extends @Nullable Object> extends ListenableFuture<V> {}

  /**
   * A less abstract subclass of AbstractFuture. This can be used to optimize setFuture by ensuring
   * that {@link #get} calls exactly the implementation of {@link AbstractFuture#get}.
   */
  abstract static class TrustedFuture<V extends @Nullable Object> extends AbstractFuture<V>
      implements Trusted<V> {

   */
  interface Trusted<V extends @Nullable Object> extends ListenableFuture<V> {}

  /**
   * A less abstract subclass of AbstractFuture. This can be used to optimize setFuture by ensuring
   * that {@link #get} calls exactly the implementation of {@link AbstractFuture#get}.
   */
  abstract static class TrustedFuture<V extends @Nullable Object> extends AbstractFuture<V>
      implements Trusted<V> {

        this.transitive = transitive;
        return this;
    }

    @Override
    @Nullable
    public String getDescription() {
        return description;
    }

    @Override
    public Configuration setDescription(@Nullable String description) {
        this.description = description;
        return this;
    }

    @Override

      return TFRTypes.TF_TENSOR_SHAPE_FUNC
    return object.__getattribute__(self, name)

  def __str__(self):
    if self.value < 4:  # pylint: disable=comparison-with-callable
      return '!tfr.' + self.name.lower()
    elif self.value < 10:  # pylint: disable=comparison-with-callable
      return '!shape.' + self.name.lower()
    else:
      return self.name.lower()


_ATTRIBUTE_TYPES = (