* Factory and utility methods for {@link java.util.concurrent.Executor}, {@link ExecutorService},
 * and {@link java.util.concurrent.ThreadFactory}.
 *
 * @author Eric Fellheimer
 * @author Kyle Littlefield
 * @author Justin Mahoney
 * @since 3.0
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public final class MoreExecutors {
  private MoreExecutors() {}

  /**

    int hashThree = map.hash(keyThree);
    InternalEntry<Object, Object, ?> entryThree =
        segment.newEntryForTesting(keyThree, hashThree, entryTwo);
    segment.setValueForTesting(entryThree, valueThree);

    // alone
    assertNull(segment.removeFromChainForTesting(entryOne, entryOne));

    // head
    assertSame(entryOne, segment.removeFromChainForTesting(entryTwo, entryTwo));

    // middle

    int hashThree = map.hash(keyThree);
    InternalEntry<Object, Object, ?> entryThree =
        segment.newEntryForTesting(keyThree, hashThree, entryTwo);
    segment.setValueForTesting(entryThree, valueThree);

    // alone
    assertNull(segment.removeFromChainForTesting(entryOne, entryOne));

    // head
    assertSame(entryOne, segment.removeFromChainForTesting(entryTwo, entryTwo));

    // middle