def view_variables
      instance_variables
        .select { |var| additional_var?(var) }
        .map { |var| fetch_ivar_value(var) }
    end
def view_variables
      instance_variables
        .select { |var| additional_var?(var) }
        .map { |var| fetch_ivar_value(var) }
    end
All user defined instance variables for current request.