Returns the value for the given
key or null if
key is not in the map.
Some maps allow keys to have
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 having a
null value. Methods like containsKey or putIfAbsent can be used if the distinction is important.
Map operator (dynamic key) => _getItem(key);
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.