How to add nodes under to different parents in Groovy Markup Builder by calling a method or closure

I would like to produce below xml. I do not want to add xsv block inside xpm and MyRoot by repeating the same code.Instead I want to call a method or closure so that It will return xsv block which can be added in the respective parent node(MyRoot and xpm)

 <MyRoot>
        <xsv>
            <action>create</action>
            <actionID>4</actionID>
       </xsv>
       <xpm>
           <xsv>
              <action>create</action>
              <actionID>4</actionID>
           </xsv>
       </xpm>
    </MyRoot>