operator [] method

@override @useResult Timezone? operator [](Object? key)

The value for the given key, or null if key is not in the map.

Some maps allow null as a value. For those maps, a lookup using this operator cannot distinguish between a key not being in the map, and the key being there with a null value. Methods like containsKey or putIfAbsent can be used if the distinction is important.

Implementation

@override
@useResult Timezone? operator [](Object? key) => key is String ? parseTimezone(key) : null;