jetbrick-commons/src/main/java/jetbrick/collections/ListOrderedMap.java
public Entry<K, V> getEntry(int index) {
        if (index < 0 || index >= size()) {
            throw new IndexOutOfBoundsException();
        }
        LinkedEntry<K, V> entry = header.next;
        for (int i = 0; i < index; i++) {
            entry = entry.next;
        }
        return entry;
    }
public Entry<K, V> getEntry(int index) {
        if (index < 0 || index >= size()) {
            throw new IndexOutOfBoundsException();
        }
        LinkedEntry<K, V> entry = header.next;
        for (int i = 0; i < index; i++) {
            entry = entry.next;
        }
        return entry;
    }
OrderedMap interface