Method contains

lib/java/util/TreeMap.java:1214–1224

(Object object)

                }

                @SuppressWarnings("unchecked")
                @Override
                public boolean contains(Object object) {
                    if (object instanceof Map.Entry) {
                        Map.Entry<K, V> entry = (Map.Entry<K, V>) object;
                        K key = entry.getKey();
                        Object v1 = TreeMap.this.get(key), v2 = entry.getValue();
                        return v1 == null ? ( v2 == null && TreeMap.this.containsKey(key) ) : v1.equals(v2);
                    }
                    return false;
                }

                @Override
                public boolean remove(Object object) {