1  var ListCache = require('./_ListCache'),
 2      stackClear = require('./_stackClear'),
 3      stackDelete = require('./_stackDelete'),
 4      stackGet = require('./_stackGet'),
 5      stackHas = require('./_stackHas'),
 6      stackSet = require('./_stackSet');
 7  
 8  /**
 9   * Creates a stack cache object to store key-value pairs.
10   *
11   * @private
12   * @constructor
13   * @param {Array} [entries] The key-value pairs to cache.
14   */
15  function Stack(entries) {
16    var data = this.__data__ = new ListCache(entries);
17    this.size = data.size;
18  }
19  
20  // Add methods to `Stack`.
21  Stack.prototype.clear = stackClear;
22  Stack.prototype['delete'] = stackDelete;
23  Stack.prototype.get = stackGet;
24  Stack.prototype.has = stackHas;
25  Stack.prototype.set = stackSet;
26  
27  module.exports = Stack;