Method containsKey

lib/java/util/TreeMap.java:462–469

(Object key)

        }

        @SuppressWarnings("unchecked")
        @Override
        public boolean containsKey(Object key) {
            if (isInRange((K) key)) {
                return backingMap.containsKey(key);
            }
            return false;
        }

        @Override
         public void clear() {