code: function normalizeBooleanAttribute(attributeName, value) {
      var ret;
      // tslint:disable-next-line
      if (typeof value === 'string') {
          ret = value === '' || value.toLocaleLowerCase() === attributeName.toLocaleLowerCase();
      }
      else {
          ret = value;
      }
      return ret;
  }
docs: @description This function will ensure that we propertly treat a potential string value for a boolean attribute
  as the boolean representation
  
  @param {string} attributeName Name of the boolean attribute we are normalizing for
  @param {boolean|string} value Existing value of the boolean html attribute represented as a boolean or string
  
  @returns {boolean}