@Test
public void removesTraits() {

    ShapeId aId = ShapeId.from("ns.foo#A");
    StringShape a = StringShape.builder()
            .id(aId)
            .addTrait(new SensitiveTrait())
            .addTrait(DeprecatedTrait.builder().build())
            .build();
    ShapeId bId = ShapeId.from("ns.foo#B");
    StringShape b = StringShape.builder()
            .id(bId)
            .addTrait(new SensitiveTrait())
            .addTrait(DeprecatedTrait.builder().build())
            .build();
    Model model = Model.builder().addShapes(a, b).build();
    ModelTransformer transformer = ModelTransformer.create();
    Model result = transformer.filterTraits(
            model, (shape, trait) -> !trait.toShapeId().equals(ShapeId.from("smithy.api#sensitive")));
    assertThat(result.shapes().count(), Matchers.is(2L));
    assertThat(result.getShape(aId).get().getTrait(SensitiveTrait.class), Matchers.is(Optional.empty()));
    assertThat(result.getShape(aId).get().getTrait(DeprecatedTrait.class), Matchers.not(Optional.empty()));
    assertThat(result.getShape(bId).get().getTrait(SensitiveTrait.class), Matchers.is(Optional.empty()));
    assertThat(result.getShape(bId).get().getTrait(DeprecatedTrait.class), Matchers.not(Optional.empty()));
}