*
     * @return The source of the POM or {@code null} if not set.
     */
    ModelSource getModelSource();

    /**
     * Sets the source of the POM to process. Eventually, either {@link #setModelSource(ModelSource)} or
     * {@link #setPomFile(File)} must be set.
     *
     * @param modelSource The source of the POM to process, may be {@code null}.
     * @return This request, never {@code null}.

      if (set.isEmpty()) {
        /*
         * The (tooLow + 1, tooHigh) arguments below would be invalid because tooLow would be
         * greater than tooHigh.
         */
        return ContiguousSet.create(Range.openClosed(0, 1), DiscreteDomain.integers()).subSet(0, 1);
      }
      int tooHigh = set.last() + 1;
      int tooLow = set.first() - 1;
      set.add(tooHigh);

    return (Set<Entry<K, V>>) super.entries();
  }

  @Override
  Set<Entry<K, V>> createEntries() {
    return new EntrySet();
  }

  private final class EntrySet extends Entries implements Set<Entry<K, V>> {
    @Override
    public int hashCode() {
      return Sets.hashCodeImpl(this);
    }

    @Override
    public boolean equals(@Nullable Object o) {

			if o.pool < len(z.serverPools) && o.set < len(z.serverPools[o.pool].sets) {
				o.debugln("Resuming", o)
				entries, err = z.serverPools[o.pool].sets[o.set].streamMetadataParts(ctx, *o)
				entries.reuse = true // We read from stream and are not sharing results.
				if err == nil {
					return entries, nil
				}
			} else {
				err = fmt.Errorf("invalid pool/set")
				o.pool, o.set = 0, 0
			}
		}

  @SuppressWarnings("GoodTime")
  long getAccessTime();

  /** Sets the entry access time in ns. */
  @SuppressWarnings("GoodTime") // b/122668874
  void setAccessTime(long time);

  /** Returns the next entry in the access queue. */
  ReferenceEntry<K, V> getNextInAccessQueue();

  /** Sets the next entry in the access queue. */
  void setNextInAccessQueue(ReferenceEntry<K, V> next);

type DeadlineConn struct {
	net.Conn
	readDeadline            time.Duration // sets the read deadline on a connection.
	readSetAt               time.Time
	writeDeadline           time.Duration // sets the write deadline on a connection.
	writeSetAt              time.Time
	abortReads, abortWrites atomic.Bool // A deadline was set to indicate caller wanted the conn to time out.
	infReads, infWrites     atomic.Bool

    private int mode;
    private long offset;

    /**
     * Sets the file identifier.
     *
     * @param fid
     *            the fid to set
     */
    public void setFid(final int fid) {
        this.fid = fid;
    }

    /**
     * Sets the seek mode.
     *
     * @param mode
     *            the mode to set
     */
    public final void setMode(final int mode) {
        this.mode = mode;

            return false;
        }
        return true;
    }

    /**
     * Returns a set of matched label values.
     *
     * @param path The path to match.
     * @return A set of matched label values.
     */
    public Set<String> getMatchedLabelValueSet(final String path) {
        if (labelTypePatternList == null) {
            synchronized (this) {

    }

    /**
     * Sets the file information class for the directory query
     *
     * @param fileInformationClass
     *            the fileInformationClass to set
     */
    public void setFileInformationClass(final byte fileInformationClass) {
        this.fileInformationClass = fileInformationClass;
    }

    /**
     * Sets the query flags for the directory enumeration
     *

import com.google.common.collect.AbstractIterator;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import java.util.Iterator;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * A class to facilitate the set returned by {@link Graph#edges()}.
 *
 * @author James Sexton
 */
abstract class EndpointPairIterator<N> extends AbstractIterator<EndpointPair<N>> {