each_template

# File actionmailer/lib/action_mailer/base.rb, line 925
    def each_template(paths, name, &block)
      templates = lookup_context.find_all(name, paths)
      if templates.empty?
        raise ActionView::MissingTemplate.new(paths, name, paths, false, 'mailer')
      else
        templates.uniq(&:formats).each(&block)
      end
    end