}

  @Override
  @CheckForNull
  public <T extends B> T getInstance(TypeToken<T> type) {
    return trustedGet(type.rejectTypeVariables());
  }

  @Override
  @CheckForNull
  public <T extends B> T getInstance(Class<T> type) {
    return trustedGet(TypeToken.of(type));
  }

  /**
   * Guaranteed to throw an exception and leave the map unmodified.
   *