public static Applier fromSource(CharSequence source, EndPosTable endPositions) {
    return new Applier(source, endPositions);
  }
@Test
  public void shouldReturnNullOnEmptyFix() {
    AppliedFix fix =
        AppliedFix.fromSource("public class Foo {}", endPositions).apply(SuggestedFix.emptyFix());
    assertThat(fix).isNull();
  }