public class AbstractIteratorTest extends TestCase {

  public void testDefaultBehaviorOfNextAndHasNext() {

    // This sample AbstractIterator returns 0 on the first call, 1 on the
    // second, then signals that it's reached the end of the data
    Iterator<Integer> iter =
        new AbstractIterator<Integer>() {
          private int rep;

          @Override
          public @Nullable Integer computeNext() {
            switch (rep++) {

import org.jspecify.annotations.Nullable;

/**
 * An abstract composition of multiple hash functions. {@linkplain #newHasher()} delegates to the
 * {@code Hasher} objects of the delegate hash functions, and in the end, they are used by
 * {@linkplain #makeHash(Hasher[])} that constructs the final {@code HashCode}.
 *
 * @author Dimitris Andreou
 */
@Immutable
abstract class AbstractCompositeHashFunction extends AbstractHashFunction {

    throw new UnsupportedOperationException();
  }

  /**
   * If this collection is backed by an array of its elements in insertion order, returns the offset
   * where this collection's elements end.
   */
  int internalArrayEnd() {
    throw new UnsupportedOperationException();
  }

  static <E> ImmutableCollection<E> unsafeDelegate(Collection<E> delegate) {

            "Cannot create a file when that file already exists.", "All pipe instances are busy.", "The pipe is being closed.",
            "No process is on the other end of the pipe.", "More data is available.", "This user account has expired.",
            "The user is not allowed to log on from this workstation.", "The user is not allowed to log on at this time.",

            "Cannot create a file when that file already exists.", "All pipe instances are busy.", "The pipe is being closed.",
            "No process is on the other end of the pipe.", "More data is available.", "This user account has expired.",
            "The user is not allowed to log on from this workstation.", "The user is not allowed to log on at this time.",

                        tokStarted = true;
                        tokBuf.append(tok.trim());
                        break;
                }
            }

            // Handle case where end of token stream and
            // still got data
            if ((!exit) && (tokStarted)) {
                retVal = tokBuf.toString();
            }
        }

        return optional ? "?" + retVal : retVal;

     */
    @Override
    public int getFileIndex() {
        return 0;
    }

    @Override
    public int getType() {
        /*
         * 0x80000000 means hidden but SmbFile.isHidden() checks for $ at end
         */
        switch (this.type & 0xFFFF) {
        case 1:
            return SmbConstants.TYPE_PRINTER;
        case 3:
            return SmbConstants.TYPE_NAMED_PIPE;
        }

                    extension.getVmEnv().forEach((k, v) -> script.add("export " + k + "=" + v));
                    script.addAll(getLinuxScript());
                    script.add("'"); // end inline bash script
                    spec.setArgs("--command", String.join("\n", script));
                    spec.setProgressHandler(progressHandler);
                });
            } catch (Exception e) {

     * @param batchMaxSize The maximum batch size delegate should receive (default {@code 500}).
     * @param blockOnLastEvent Should this listener block on last transfer end (completed or corrupted) block? (default {@code true}).
     */
    public SimplexTransferListener(
            TransferListener delegate, int queueSize, int batchMaxSize, boolean blockOnLastEvent) {

import static java.util.Objects.requireNonNull;

/**
 * Type deriver, that handles special case of "processor" type: if a dependency node is of this type, all of its
 * children need to be remapped to certain processor type as well, to end up on proper path type.
 *
 * @since 4.0.0
 * @deprecated since 4.0.0, this is internal detail of Maven.
 */
@Deprecated(since = "4.0.0")
public class TypeDeriver implements DependencyGraphTransformer {