private void updateDefaults() {
    myAnnotationSupports = AnnotationPackageSupport.EP_NAME.getExtensionList();
    myDefaultNullables = StreamEx.of(myAnnotationSupports)
      .cross(s -> s.getNullabilityAnnotations(Nullability.NULLABLE).stream()).invert().toMap();
    myDefaultNotNulls = StreamEx.of(myAnnotationSupports)
      .cross(s -> s.getNullabilityAnnotations(Nullability.NOT_NULL).stream()).invert().toMap();
    myDefaultUnknowns = StreamEx.of(myAnnotationSupports)
      .cross(s -> s.getNullabilityAnnotations(Nullability.UNKNOWN).stream()).invert().toMap();
    myDefaultAll = StreamEx.of(myDefaultNullables, myDefaultNotNulls, myDefaultUnknowns).toFlatList(Map::keySet);
    normalizeDefaults();
  }
private void updateDefaults()