assertThrows(IllegalArgumentException.class, () -> builder.maximumSize(-1));
  }

  public void testMaximumSize_setTwice() {
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().maximumSize(16);
    assertThrows(IllegalStateException.class, () -> builder.maximumSize(16));
  }

  @GwtIncompatible // maximumWeight
  public void testMaximumSize_andWeight() {