code: public static <A, B> Map<A, B> getMapUnsafe(final Map map, final Object... path) {
          return getUnsafe(map, Map.class, path);
      }
docs: Get map value by path.
  @param <A> map key type
  @param <B> map value type
  @param map subject
  @param path nodes to walk in map
  @return value