return new RegularImmutableList<E>(ImmutableList.<E>nullCheckedList(e1, e2, e3));
  }

  public static <E> ImmutableList<E> of(E e1, E e2, E e3, E e4) {
    return new RegularImmutableList<E>(ImmutableList.<E>nullCheckedList(e1, e2, e3, e4));
  }

  public static <E> ImmutableList<E> of(E e1, E e2, E e3, E e4, E e5) {
    return new RegularImmutableList<E>(ImmutableList.<E>nullCheckedList(e1, e2, e3, e4, e5));
  }

    Object[] builderArray = builder.contents;
    for (int i = 0; i < 10; i++) {
      builder.add(i);
    }
    Object[] builderArrayAfterAdds = builder.contents;
    RegularImmutableList<Integer> list = (RegularImmutableList<Integer>) builder.build();
    Object[] listInternalArray = list.array;
    assertSame(builderArray, builderArrayAfterAdds);
    assertSame(builderArray, listInternalArray);
  }

    }
  }

  /** A singleton implementation of iterator() for the empty ImmutableList. */
  // TODO(b/345814817): Move this to RegularImmutableList?
  @SuppressWarnings("ClassInitializationDeadlock")
  private static final UnmodifiableListIterator<Object> EMPTY_ITR =
      new Itr<Object>(RegularImmutableList.EMPTY, 0);

  private static final class Itr<E> extends AbstractIndexedListIterator<E> {
    private final ImmutableList<E> list;

    Object[] builderArray = builder.contents;
    for (int i = 0; i < 10; i++) {
      builder.add(i);
    }
    Object[] builderArrayAfterAdds = builder.contents;
    RegularImmutableList<Integer> list = (RegularImmutableList<Integer>) builder.build();
    Object[] listInternalArray = list.array;
    assertSame(builderArray, builderArrayAfterAdds);
    assertSame(builderArray, listInternalArray);
  }