<call id="a1" endpoint="timeout">
  <parameters>
    <label></label>
    <method>:post</method>
    <arguments>
      <timeout>2</timeout>
    </arguments>
  </parameters>
  <code>
    <finalize output="result">  data.x += "a1,"</finalize>
    <update output="result">  data.x += "a1,"</update>
  </code>
</call>
