@Override
        public Iterator<String> iterator() {
            return new KeySetIterator();
        }
Determine whether this map should remove the given eldest entry.

@return {@code true} for removing it, {@code false} for keeping it
see LinkedHashMap#removeEldestEntry
analyzer/src/main/java/nl/basjes/parse/useragent/utils/springframework/util/LinkedCaseInsensitiveMap.java