IndexMap<K extends dynamic, V>.fromEntries constructor
Implementation
IndexMap.fromEntries(List<K> keys, Iterable<MapEntry<K, V>> entries)
: assert(keys.every((key) => entries.map((entry) => entry.key).contains(key))),
_keysReference = keys,
_valuesBuffer = List.from((IndexMap<K, V?>.filled(keys, null)..addEntries(entries))._valuesBuffer);