code: public static <K, V> LinkedHashMultimap<K, V> create(
        Multimap<? extends K, ? extends V> multimap) {
      LinkedHashMultimap<K, V> result = create(multimap.keySet().size(), DEFAULT_VALUE_SET_CAPACITY);
      result.putAll(multimap);
      return result;
    }
docs: Constructs a {@code LinkedHashMultimap} with the same mappings as the specified multimap. If a
  key-value mapping appears multiple times in the input multimap, it only appears once in the
  constructed multimap. The new multimap has the same {@link Multimap#entries()} iteration order
  as the input multimap, except for excluding duplicate mappings.
  
  @param multimap the multimap whose contents are copied to this multimap