} catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)
  public void testRemoveIf_alwaysTrueUnsupported() {
    assertThrows(UnsupportedOperationException.class, () -> collection.removeIf(x -> true));
    expectUnchanged();
    assertTrue(collection.contains(samples.e0()));
  }