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/**
     * Asserts that all properties exist on an object prototype.
     * @param {Array} properties An array of property names that should be on the object.
     * @param {Object} object The object to search.
     * @param {String} message (Optional) The message to display if the assertion fails.
     * @method inheritsKeys
     * @static
     */   
    inheritsKeys: function (properties, object, message) {
        YUITest.Assert._increment();       
        for (var i=0; i < properties.length; i++){
            if (!(propertyName in object && !object.hasOwnProperty(properties[i]))){
                YUITest.Assert.fail(YUITest.Assert._formatMessage(message, "Property '" + properties[i] + "' not found on object instance."));
            }     
        }
    },

propertyName

properties[i]