!7

sclass Bla {
  swappable S hello() { ret "yo"; }
}

p-exp {
  new Bla bla;
  
  // normal call
  assertEqualsVerbose("yo", bla.hello());
  
  // override method at runtime (!)
  bla.hello = () -> "Here is random stuff: " + randomID();
  
  // overridden call
  assertStartsWith_rev("Here is random stuff:", print(bla.hello()));
}