@Test
 public void testMapAlist() {
   Map<Object, Object> m = new LinkedHashMap<>();
   m.put("foo", new Symbol("bar"));
   m.put("baz", new Symbol("quux"));
   lwriter.writeAlist(m);
   assertEquals("'((\"foo\" . bar) (\"baz\" . quux))", output.toString());
   reset();
   lwriter.writeUnknown(m);
   assertEquals("'((\"foo\" . bar) (\"baz\" . quux))", output.toString());
 }