def instance_readers
      _attrs.map { |k, v| [:attr_writer].any? { |t| v[:type] == t } ? nil : k }.compact
    end
def instance_readers
      _attrs.map { |k, v| [:attr_writer].any? { |t| v[:type] == t } ? nil : k }.compact
    end
Lists all attr_* getter methods that were created on this class.