this.store.has(key)) {
      this.store.set(key, new Map());
    }

    const innerMap = this.store.get(key);
    innerMap.set(nestedKey, value);
  }

  /**
   * Removes the value associated to the key and nestedKey.
   *
   * @param {object} key
   *        The key associated with the desired value.
   * @param {string} nestedKey
   *        The nested key associated with the desired value.
   *
   * @returns True if an element in the store has been removed successfully.
   *          False if the key is not found in the store.
   */
  delete(key, nestedKey) {
    if (!this.store.has(key)) {
      return false;
    }

    return this.store.get(key).delete(nestedKey);
  }

  /**
   * Clear the store.
   */
  clear() {
    this.store = new WeakMap();
  }
}

module.exports = WeakMapMap;
PK