.createVariantBuilder(VariantType.AUDIO);
variantBuilder.setSelectionBuilder(POLICY_FACTORY
.createDefaultSelectionBuilder());
AudioMetaDataBuilder builder = POLICY_FACTORY
.createAudioMetaDataBuilder();
builder.setAudioEncoding(AudioEncoding.MP3);
URLContentBuilder urlContentBuilder = POLICY_FACTORY
.createURLContentBuilder();
urlContentBuilder.setURL("/foo.mp3");
variantBuilder.setContentBuilder(urlContentBuilder);