class Roda::RodaPlugins::Render::TemplateMtimeWrapper

def if_modified

the template object and the modification time. Other return false.
If the template file has been updated, return true and update
def if_modified
  begin
    mtime = template_last_modified
  rescue
    # ignore errors
  else
    if mtime != @mtime
      reset_template
      yield
      @mtime = mtime
    end
  end
end