Successful zipper tree modification

zipper_success

val original = 
<parent>
  <child>
    <something1/>
    <element id="foo">
      <section>
        <replace id="bar"/>
      </section>
    </element>
    <something2/>
  </child>
</parent>.convert

val insert = 
<replace key="value">
  <foo>foo</foo>
  <bar>bar</bar>
</replace>.convert

val replace = (original \\ 'replace) filter (item => item.attrs("id").contains("bar"))
replace.updated(0, insert).unselect