private static class ActivationWalker extends MavenTransformer {

        private final Deque<ActivationFrame> stk;

        ActivationWalker(Deque<ActivationFrame> stk, UnaryOperator<String> transformer) {
            super(transformer);
            this.stk = stk;
        }

        private ActivationFrame nextFrame(String property) {
            return new ActivationFrame(property, Optional.empty());

    <glob pattern="*.pfr"/>
  </mime-type>
  <mime-type type="application/h224"/>
  <mime-type type="application/http"/>
  <mime-type type="application/hyperstudio">
    <glob pattern="*.stk"/>
  </mime-type>
  <mime-type type="application/ibe-key-request+xml"/>
  <mime-type type="application/ibe-pkg-reply+xml"/>
  <mime-type type="application/ibe-pp-data"/>
  <mime-type type="application/iges"/>