text: 'use strict';
  
  const wbcStack = module.exports = {};
  
  wbcStack.stack = function() {
    var storage = [];
  
    this.push = function() {
      if (!arguments) return null;
      storage.push.apply(storage, arguments);
    };
    this.pop = function() {
      return storage.pop.apply(storage, arguments);
    };
    this.size = function() {
      return storage.length;
    };
    this.peek = function() {
      return storage;
    };
  };
  