<itemvalue="Whether this map contains the given [key]. Returns true if any of the keys in the map are equal to `key` according to the equality used by the map. ```dart final moonCount = <String, int>{'Mercury': 0, 'Venus': 0, 'Earth': 1, 'Mars': 2, 'Jupiter': 79, 'Saturn': 82, 'Uranus': 27, 'Neptune': 14 }; final containsUranus = moonCount.containsKey('Uranus'); true final containsPluto = moonCount.containsKey('Pluto'); false ```"/>
<itemvalue="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."/>
<itemvalue="Creates a new string by concatenating this string with itself a number of times. The result of `str n` is equivalent to `str + str + ...`(n times)`... + str`. ```dart const string = 'Dart'; final multiplied = string 3; print(multiplied); 'DartDartDart' ``` Returns an empty string if [times] is zero or negative."/>
<itemvalue="Creates a new string by concatenating this string with itself a number of times. The result of `str n` is equivalent to `str + str + ...`(n times)`... + str`. ```dart const string = 'Dart'; final multiplied = string 3; print(multiplied); 'DartDartDart' ``` Returns an empty string if [times] is zero or negative."/>
<itemvalue="shuffle"/>
<itemvalue="shuffle"/>
<itemvalue="Shuffles the elements of this list randomly. ```dart final numbers = <int>[1, 2, 3, 4, 5]; numbers.shuffle(); print(numbers); [1, 3, 4, 5, 2] OR some other random result. ```"/>
<itemvalue="Shuffles the elements of this list randomly. ```dart final numbers = <int>[1, 2, 3, 4, 5]; numbers.shuffle(); print(numbers); [1, 3, 4, 5, 2] OR some other random result. ```"/>
