interface CompressionRegime_AnyType<A> {
  byte[] decompressorToBytes(A decompressor);
  A decompressorFromBytes(byte[] compressed);
  
  // return type O to make regime reusable e.g. for elements of lists
  O runDecompressor(A a);
  
  // e.g. full eval check
  CompressionRegime_AnyType<A> fullRegime();
}