code: public static List<CssMetaData<? extends Styleable, ?>> createCssMetaDataList(List<CssMetaData<? extends Styleable, ?>> baseList, CssMetaData<? extends Styleable, ?>... metaData) {
          List<CssMetaData<? extends Styleable, ?>> styleables = new ArrayList<>(baseList);
          styleables.addAll(Arrays.asList(metaData));
          return Collections.unmodifiableList(styleables);
      }
docs: Creates a List of CssMetaData instances that is merged by the given parameters
  @param baseList A basic list. All elements of the list will be in the returned list
  @param metaData An array of CssMetaData instances. All instances will be in the returned list
  @return A list with all given CssMetaData instances