module foo {
    namespace "foo";
    prefix "foo";
    yang-version 1;

    revision 2015-09-02 {
        description "Test";
    }

    grouping my-grouping {
        container my-container-in-grouping {
        }
    }

    augment /augment-target {
        uses my-grouping {
            augment my-container-in-grouping {
                leaf-list l2 {
                    type string;
                    ordered-by "user";
                    foo:bar "argument";
                    foo:baz "$X(/a/a/a/@@)";
                }
            }
        }
    }

    container augment-target {
    }

    extension bar {
        argument "arg";
    }

    extension baz {
        argument "arg";
    }
}