static noeq record FunctionCall(O function, O... args) {
  toString {
    ret function + "(" + joinWithComma(allToString(args)) + ")";
  }
  
  bool equals(O o) {
    ret o instanceof FunctionCall
      && eq(function, o/FunctionCall.function)
      && objectArraysEqual(args, o/FunctionCall.args);
  }
  
  int hashCode() {
    ret hashAboutObjects(function, asList(args));
  }
}