module refgrp-m2 {

  namespace "urn:fri:params:xml:ns:yang:refgrp-m2";

  prefix rg-m2;

  import refgrp-m4 {

    prefix rg-m4;

  }

  typedef enum1 {

    type enumeration {

      enum e1val1 {

      }

      enum e1val2 {

      }

    }

  }

  grouping grp1 {

    leaf gleaf1 {

      type enum1;

      default e1val2;

    }

  }

  grouping grp2 {

    uses rg-m4:grp1 {

      augment "choice1/case1" {

        uses rg-m2:grp1;

      }

    }

  }

}