public static Stella_Object idlTranslateATree(Stella_Object tree) {
    if (Stella_Object.safePrimaryType(tree) == Stella.SGT_STELLA_CONS) {
      { Cons tree000 = ((Cons)(tree));

        if (tree000 == Stella.NIL) {
          return (tree000.idlTranslateAtomicTree());
        }
        else {
          return (Stella.idlTranslateNull());
        }
      }
    }
    else {
      if (tree == null) {
        return (Stella.idlTranslateNull());
      }
      return (tree.idlTranslateAtomicTree());
    }
  }