wffweb/src/main/java/com/webfirmframework/wffweb/tag/html/attribute/core/AbstractValueSetAttribute.java
private static Collection<String> extractValues(final String value) {
        final String[] inputValues = StringUtil.splitBySpace(value);
        final Collection<String> allValues = new ArrayDeque<>();
        for (final String each : inputValues) {
            // As per Collections.addAll's doc it is faster than
            // allValues.addAll(Arrays.asList(values));
            Collections.addAll(allValues, StringUtil.strip(each));
        }
        return allValues;
    }
private static Collection<String> extractValues(final String value) {
        final String[] inputValues = StringUtil.splitBySpace(value);
        final Collection<String> allValues = new ArrayDeque<>();
        for (final String each : inputValues) {
            // As per Collections.addAll's doc it is faster than
            // allValues.addAll(Arrays.asList(values));
            Collections.addAll(allValues, StringUtil.strip(each));
        }
        return allValues;
    }
/*
splits by space