Method toComparable

lib/java/util/TreeMap.java:161–167

(T obj)

    }

    @SuppressWarnings("unchecked")
     private static <T> Comparable<T> toComparable(T obj) {
        if (obj == null) {
            throw new NullPointerException();
        }
        return (Comparable) obj;
    }

    static class AbstractMapIterator <K,V> {
        TreeMap<K, V> backingMap;