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

        if (((GeneralizedSymbol)(tree000.value)) == Stella.SYM_STELLA_TYPED_SYS) {
          return (Stella_Object.atomicExpressionP(tree000.rest.value));
        }
        else {
        }
        return (false);
      }
    }
    else {
      return (true);
    }
  }