Method contains

output/java_guava/1.4.19/Maps.java:3954–3964

(Object o)

    }

    @Override
    public boolean contains(Object o) {
      if (o instanceof Entry) {
        Entry<?, ?> entry = (Entry<?, ?>) o;
        Object key = entry.getKey();
        V value = Maps.safeGet(map(), key);
        return Objects.equal(value, entry.getValue())
        && (value != null || map().containsKey(key));
      }
      return false;
    }

    @Override
    public boolean isEmpty() {