public ProtoId adjust(ProtoId protoId) {
    return new ProtoId(
        target,
        adjustString(protoId.getShortyIndex()),
        adjustType(protoId.getReturnTypeIndex()),
        adjustTypeListOffset(protoId.getParametersOffset()));
  }
Maps the index offsets from one dex file to those in another. For example, if you have string #5
in the old dex file, its position in the new dex file is {@code strings[5]}.
android/android_framework/dex-maker/src/main/java/com/android/dx/merge/IndexMap.java