public DalvInsn withMapper(RegisterMapper mapper) {
    return withRegisters(mapper.map(getRegisters()));
  }
Returns an instance that is just like this one, except that the register list is mapped by
using {@code mapper}.

@param mapper {@code non-null;} used to map registers
@return {@code non-null;} an appropriately-constructed instance
android/android_framework/dex-maker/src/main/java/com/android/dx/dex/code/DalvInsn.java