in src/main/java/org/jetbrains/jetCheck/DataSerializer.java [49:56]
static String serialize(Iteration iteration, StructureElement node) {
ByteArrayOutputStream data = new ByteArrayOutputStream();
writeINT(data, (int)(iteration.iterationSeed >> 32));
writeINT(data, (int)iteration.iterationSeed);
writeINT(data, iteration.sizeHint);
node.serialize(data);
return Base64.getEncoder().encodeToString(data.toByteArray());
}