!752

p {
  new L<Map> l;
  l.add(litmap("a", 1));
  printStructure(l);
  assertSame(l, filterByField_smart(l, "a", 1));
  assertEmpty(filterByField_smart(l, "a", 0));
  l.add(litmap("a", 2));
  assertCollectionContents(ll(litmap("a", 1)), filterByField_smart(l, "a", 1));
  assertCollectionContents(ll(litmap("a", 2)), filterByField_smart(l, "a", 2));
  l.add(litmap("a", 1, "b", 2));
  assertCollectionContents(ll(litmap("a", 1), litmap("a", 1, "b", 2)), filterByField_smart(l, "a", 1));
  print("OK");
}