< > BotCompany Repo | #1027844 // nestedMapRemove - remove entry from map in map; remove inner map if empty

JavaX fragment (include) [tags: use-pretranspiled]

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static <A, B, C> C nestedMapRemove(Map<A, Map<B, C>> map, A a, B b) {
  if (map == null) null;
  Map<B, C> map2 = map.get(a);
  if (map2 == null) null;
  C oldValue = map2.remove(b);
  if (empty(map2)) map.remove(a);
  ret oldValue;
}

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