code: function Comparison (driver, comparisonList) {
  	this._driver = driver;
  
  	this._comparisons = {};
  	comparisonList.forEach(function (comparison) {
  		this._loadComparison(comparison);
  	}.bind(this));
  }
docs: Comparison object
  
  @constructor
  @class Comparison
  @module WebDriver
  @submodule Helpers
  @param {Driver} driver
  @param {string[]} comparisonList List of tools to use for comparison