Method putAll

classpath/java/util/Collections.java:315–317

(Map<? extends K, ? extends V> elts)

      synchronized (lock) { return map.put(key, value); }
    }
    public void putAll(Map<? extends K, ? extends V> elts) {
      synchronized (lock) { map.putAll(elts); }
    }
    public V remove(Object key) {
      synchronized (lock) { return map.remove(key); }
    }