xmlns="urn:ietf:params:xml:ns:yang:yin:1"

           xmlns:m2="urn:fri:params:xml:ns:yang:imp_aug_m2">

  <belongs-to module="imp_aug_m1">

    <prefix value="m1"/>

  </belongs-to>

  <import module="imp_aug_m2">

    <prefix value="m2"/>

  </import>

  <grouping name="grp1">

    <uses name="m2:grp1">

      <augment target-node="choice1">

        <case name="case3">

          <leaf name="c3_leaf">

            <type name="empty"/>

          </leaf>

        </case>

      </augment>

    </uses>

  </grouping>

</submodule>