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/** * Removes `key` and its value from the stack. * * @private * @name delete * @memberOf Stack * @param {string} key The key of the value to remove. * @returns {boolean} Returns `true` if the entry was removed, else `false`. */function stackDelete(key) {  var data = this.__data__,      result = data['delete'](key);
  this.size = data.size;  return result;}
module.exports = stackDelete;