* to this implementation.
   *
   * @since 7.0
   */
  protected void standardPutAll(Map<? extends K, ? extends V> map) {
    Maps.putAllImpl(this, map);
  }

  /**
   * A sensible, albeit inefficient, definition of {@link #remove} in terms of the {@code iterator}

   * to this implementation.
   *
   * @since 7.0
   */
  protected void standardPutAll(Map<? extends K, ? extends V> map) {
    Maps.putAllImpl(this, map);
  }

  /**
   * A sensible, albeit inefficient, definition of {@link #remove} in terms of the {@code iterator}

    }
    return sb.append('}').toString();
  }

  /** An implementation of {@link Map#putAll}. */
  static <K extends @Nullable Object, V extends @Nullable Object> void putAllImpl(
      Map<K, V> self, Map<? extends K, ? extends V> map) {
    for (Entry<? extends K, ? extends V> entry : map.entrySet()) {
      self.put(entry.getKey(), entry.getValue());
    }
  }

    }
    return sb.append('}').toString();
  }

  /** An implementation of {@link Map#putAll}. */
  static <K extends @Nullable Object, V extends @Nullable Object> void putAllImpl(
      Map<K, V> self, Map<? extends K, ? extends V> map) {
    for (Entry<? extends K, ? extends V> entry : map.entrySet()) {
      self.put(entry.getKey(), entry.getValue());
    }
  }