1  /**
 2   * Checks if a stack value for `key` exists.
 3   *
 4   * @private
 5   * @name has
 6   * @memberOf Stack
 7   * @param {string} key The key of the entry to check.
 8   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 9   */
10  function stackHas(key) {
11    return this.__data__.has(key);
12  }
13  
14  module.exports = stackHas;