public static @NotNull Iterable<String> splitClassNames(@Nullable String classAttributeValue) {
    // comma is useduse as separator because class name cannot contain comma but it can be part of JSF classes attributes
    return classAttributeValue != null ? StringUtil.tokenize(classAttributeValue, " \t,") : Collections.emptyList();
  }
public static @NotNull Iterable<String> splitClassNames(@Nullable String classAttributeValue)