return result;
    }
    return new UnmodifiableIterable<>(iterable);
  }

  /**
   * Simply returns its argument.
   *
   * @deprecated no need to use this
   * @since 10.0
   */
  @Deprecated
  public static <E> Iterable<E> unmodifiableIterable(ImmutableCollection<E> iterable) {
    return checkNotNull(iterable);
  }

  private static final class UnmodifiableIterable<T extends @Nullable Object>

    Iterable<String> iterable = Iterables.unmodifiableIterable(list);
    Iterable<String> iterable2 = Iterables.unmodifiableIterable(iterable);
    assertSame(iterable, iterable2);
    ImmutableList<String> immutableList = ImmutableList.of("a", "b", "c");
    assertSame(immutableList, Iterables.unmodifiableIterable(immutableList));
    assertSame(immutableList, Iterables.unmodifiableIterable((List<String>) immutableList));
  }

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.collect.Iterables.unmodifiableIterable;
import static com.google.common.collect.ReflectionFreeAssertThrows.assertThrows;
import static com.google.common.collect.Sets.cartesianProduct;
import static com.google.common.collect.Sets.newEnumSet;