* SecureDirectoryStream} is not supported).
 *
 * <p>{@link RecursiveDeleteOption#ALLOW_INSECURE} can be used to force the recursive delete method
 * to proceed anyway.
 *
 * @since NEXT (but since 21.0 in the JRE flavor)
 * @author Colin Decker
 */
@J2ktIncompatible
@GwtIncompatible
@J2ObjCIncompatible // java.nio.file
@ElementTypesAreNonnullByDefault

      //   B) if we're getting this path for recursive delete, it's typically not possible to
      //      delete the working dir with a relative path anyway, so it's ok to fail.
      //   C) if we're getting it for opening a new SecureDirectoryStream, there's no need to get
      //      the parent path anyway since we can safely open a DirectoryStream to the path without
      //      worrying about a symlink.
      return null;
    } else {

      //   B) if we're getting this path for recursive delete, it's typically not possible to
      //      delete the working dir with a relative path anyway, so it's ok to fail.
      //   C) if we're getting it for opening a new SecureDirectoryStream, there's no need to get
      //      the parent path anyway since we can safely open a DirectoryStream to the path without
      //      worrying about a symlink.
      return null;
    } else {

    arraycopy(contents, 0, result, 0, contents.length);
    return result;
  }

  /*
   * a "type A" unmodifiable collection freaks out proactively, even if there
   * wasn't going to be any actual work to do anyway
   */

  @Override
  public boolean addAll(Collection<? extends E> elementsToAdd) {
    throw up();
  }

  @Override
  public boolean removeAll(Collection<?> elementsToRemove) {
    throw up();

        } else {
            paths.put(id, path);
        }
    }

    /**
     * Retrieve a stream of the project's artifacts.
     * Do not include the POM artifact as the file can't be set anyway.
     */
    private Stream<org.apache.maven.artifact.Artifact> getProjectArtifacts(MavenProject project) {
        return Stream.concat(Stream.of(project.getArtifact()), project.getAttachedArtifacts().stream());
    }

        if (method.getDeclaringClass().equals(TypeVariableImpl.class)) {
          try {
            method.setAccessible(true);
          } catch (AccessControlException e) {
            // OK: the method is accessible to us anyway. The setAccessible call is only for
            // unusual execution environments where that might not be true.
          }
          builder.put(method.getName(), method);
        }
      }

                    || actualOsName.contains("me")
                    // wince isn't really 9x, but crippled enough to
                    // be a muchness. Maven doesnt run on CE, anyway.
                    || actualOsName.contains("ce"));
            isNT = !is9x;
        }
        switch (family) {
            case FAMILY_WINDOWS:
                return isWindows;

  }

  // Technically we should test other reentrant scenarios (9 combinations of
  // hasNext/next/peek), but we'll cop out for now, knowing that peek() and
  // next() both start by invoking hasNext() anyway.

  /** Throws an undeclared checked exception. */
  private static void sneakyThrow(Throwable t) {
    class SneakyThrower<T extends Throwable> {

  }

  // Technically we should test other reentrant scenarios (9 combinations of
  // hasNext/next/peek), but we'll cop out for now, knowing that peek() and
  // next() both start by invoking hasNext() anyway.

  /** Throws an undeclared checked exception. */
  private static void sneakyThrow(Throwable t) {
    class SneakyThrower<T extends Throwable> {

            })
        .named("AbstractSet")
        .withFeatures(
            CollectionFeature.NONE,
            CollectionFeature.ALLOWS_NULL_VALUES,
            CollectionFeature.KNOWN_ORDER, // in this case, anyway
            CollectionSize.ANY)
        .suppressing(suppressForAbstractSet())
        .createTestSuite();
  }

  public Test testsForBadlyCollidingHashSet() {
    return SetTestSuiteBuilder.using(