* undocumented and subject to change.
   *
   * <p>Note that if {@code list} is a {@code List<String>}, then {@code ImmutableList.copyOf(list)}
   * returns an {@code ImmutableList<String>} containing each of the strings in {@code list}, while
   * {@code ImmutableList.of(list)} returns an {@code ImmutableList<List<String>>} containing one
   * element (the given list itself).
   *

  @SuppressWarnings("unchecked")
  public static <E> ImmutableList<E> of() {
    return (ImmutableList<E>) RegularImmutableList.EMPTY;
  }

  public static <E> ImmutableList<E> of(E e1) {
    return new SingletonImmutableList<E>(checkNotNull(e1));
  }

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

          .put(ListIterator.class, ImmutableList.of().listIterator())
          .put(Iterable.class, ImmutableSet.of())
          .put(Collection.class, ImmutableList.of())
          .put(ImmutableCollection.class, ImmutableList.of())
          .put(List.class, ImmutableList.of())
          .put(ImmutableList.class, ImmutableList.of())
          .put(Set.class, ImmutableSet.of())

    Collection<String> c = ImmutableList.of("a", "b", "c");
    assertTrue(c.equals(ImmutableList.of("a", "b", "c")));
    assertFalse(c.equals(ImmutableList.of("a", "c", "b")));
    assertFalse(c.equals(ImmutableList.of("a", "b")));
    assertFalse(c.equals(ImmutableList.of("a", "b", "c", "d")));
  }

  public void testBuilderAdd() {
    ImmutableList<String> list =

                return list;
              }
            });
    assertEquals(ImmutableList.of("foo"), list);
    assertTrue(lines.wasStreamOpened() && lines.wasStreamClosed());
  }

  public void testForEachLine() throws IOException {
    source = new TestCharSource(LINES);

    ImmutableList.Builder<String> builder = ImmutableList.builder();
    source.forEachLine(builder::add);

      return of();
    }
    ImmutableMap.Builder<K, ImmutableList<V>> builder =
        new ImmutableMap.Builder<>(mapEntries.size());
    int size = 0;

    for (Entry<K, ImmutableCollection.Builder<V>> entry : mapEntries) {
      K key = entry.getKey();
      ImmutableList.Builder<V> values = (ImmutableList.Builder<V>) entry.getValue();
      ImmutableList<V> list =

  private static final ImmutableList<Double> ONE_TO_FIVE_AND_POSITIVE_INFINITY =
      ImmutableList.of(3.0, 5.0, POSITIVE_INFINITY, 1.0, 4.0, 2.0);
  private static final ImmutableList<Double> ONE_TO_FIVE_AND_NEGATIVE_INFINITY =
      ImmutableList.of(3.0, 5.0, NEGATIVE_INFINITY, 1.0, 4.0, 2.0);
  private static final ImmutableList<Double> NEGATIVE_INFINITY_AND_FIVE_POSITIVE_INFINITIES =

  private static final ImmutableList<Double> ONE_TO_FIVE_AND_POSITIVE_INFINITY =
      ImmutableList.of(3.0, 5.0, POSITIVE_INFINITY, 1.0, 4.0, 2.0);
  private static final ImmutableList<Double> ONE_TO_FIVE_AND_NEGATIVE_INFINITY =
      ImmutableList.of(3.0, 5.0, NEGATIVE_INFINITY, 1.0, 4.0, 2.0);
  private static final ImmutableList<Double> NEGATIVE_INFINITY_AND_FIVE_POSITIVE_INFINITIES =

    Collection<String> c = ImmutableList.of();
    assertSame(c, ImmutableList.copyOf(c));
  }

  public void testCopyOf_shortcut_singleton() {
    Collection<String> c = ImmutableList.of("a");
    assertSame(c, ImmutableList.copyOf(c));
  }

  public void testCopyOf_shortcut_immutableList() {
    Collection<String> c = ImmutableList.of("a", "b", "c");
    assertSame(c, ImmutableList.copyOf(c));
  }

    }
  }

  private static final ImmutableList<Double> FINITE_TOLERANCE_CANDIDATES =
      ImmutableList.of(-0.0, 0.0, 1.0, 100.0, 10000.0, Double.MAX_VALUE);

  private static final Iterable<Double> TOLERANCE_CANDIDATES =
      ImmutableList.copyOf(
          Iterables.concat(
              FINITE_TOLERANCE_CANDIDATES, ImmutableList.of(Double.POSITIVE_INFINITY)));