concept G22LeftArrowScript {
  S description;

  // the script ("saved" text)
  S text;
  
  // text currently modified in an editor (or null)
  S editingText;
  
  void _doneLoading {
    cMigrateField(this, "code", "text");
  }
  
  S myType() { ret dropPrefix("G22", shortClassName(this)); }
  
  toString { ret or2(description, myType() + " " + id); }
}