* @author Ben Yu
 * @since 13.0
 */
@DoNotMock("Use ImmutableTypeToInstanceMap or MutableTypeToInstanceMap")
@ElementTypesAreNonnullByDefault
public interface TypeToInstanceMap<B extends @Nullable Object>
    extends Map<TypeToken<? extends @NonNull B>, B> {

  /**
   * Returns the value the specified class is mapped to, or {@code null} if no entry for this class

 * @author Ben Yu
 * @since 13.0
 */
@DoNotMock("Use ImmutableTypeToInstanceMap or MutableTypeToInstanceMap")
@ElementTypesAreNonnullByDefault
public interface TypeToInstanceMap<B extends @Nullable Object>
    extends Map<TypeToken<? extends @NonNull B>, B> {

  /**
   * Returns the value the specified class is mapped to, or {@code null} if no entry for this class

 *
 * <ul>
 *   <li>{@link ImmutableClassToInstanceMap}
 *   <li>{@link MutableClassToInstanceMap}
 * </ul>
 *
 * <p>To map a generic type to an instance of that type, use {@link
 * com.google.common.reflect.TypeToInstanceMap} instead.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/NewCollectionTypesExplained#classtoinstancemap">{@code
 * ClassToInstanceMap}</a>.
 *

 * @author Ben Yu
 * @since 13.0
 */
@ElementTypesAreNonnullByDefault
public final class MutableTypeToInstanceMap<B extends @Nullable Object>
    extends ForwardingMap<TypeToken<? extends @NonNull B>, B> implements TypeToInstanceMap<B> {

  private final Map<TypeToken<? extends @NonNull B>, B> backingMap = Maps.newHashMap();

  @Override
  @CheckForNull
  public <T extends @NonNull B> T getInstance(Class<T> type) {

 * @author Ben Yu
 * @since 13.0
 */
@ElementTypesAreNonnullByDefault
public final class MutableTypeToInstanceMap<B extends @Nullable Object>
    extends ForwardingMap<TypeToken<? extends @NonNull B>, B> implements TypeToInstanceMap<B> {

  private final Map<TypeToken<? extends @NonNull B>, B> backingMap = Maps.newHashMap();

  @Override
  @CheckForNull
  public <T extends @NonNull B> T getInstance(Class<T> type) {

                CollectionSize.ANY,
                MapFeature.ALLOWS_ANY_NULL_QUERIES)
            .createTestSuite());

    return suite;
  }

  private TypeToInstanceMap<Object> map;

  @Override
  protected void setUp() throws Exception {
    map = new MutableTypeToInstanceMap<>();
  }

  public void testPutThrows() {
    assertThrows(