<itemvalue="Adds a description of a specific type of widget missing from the current build context's ancestry tree. You can find an example of using this method in [debugCheckHasMaterial]."/>
<itemvalue="Returns the nearest widget of the given type `T` and creates a dependency on it, or null if no appropriate widget is found. The widget found will be a concrete [InheritedWidget] subclass, and calling [dependOnInheritedWidgetOfExactType] registers this build context with the returned widget. When that widget changes (or a new widget of that type is introduced, or the widget goes away), this build context is rebuilt so that it can obtain new values from that widget. {@template flutter.widgets.BuildContext.dependOnInheritedWidgetOfExactType} This is typically called implicitly from `of()` static methods, e.g. [Theme.of]."/>
<itemvalue="This callback shouldn't be used to update the slider [value] (use [onChanged] for that), but rather to be notified when the user has started selecting a new value by starting a drag or with a tap. The value passed will be the last [value] that the slider had before the change began."/>
<itemvalue="Called when the user starts selecting a new value for the slider."/>
<itemvalue="If [exclusive] is `true` and to-be-created file already exists, this operation completes the future with a [FileSystemException]. If [exclusive] is `false`, existing files are left untouched by [createSync]. Calling [createSync] on an existing file still might fail if there are restrictive permissions on the file."/>
@ -60,14 +62,12 @@
<itemvalue="emoticon"/>
<itemvalue="Emote"/>
<itemvalue="Kurdish"/>
<itemvalue="Updates the value for the provided [key]. Returns the new value associated with the key. If the key is present, invokes [update] with the current value and stores the new value in the map. If the key is not present and [ifAbsent] is provided, calls [ifAbsent] and adds the key with the returned value to the map. If the key is not present, [ifAbsent] must be provided. ```dart final planetsFromSun = <int, String>{1: 'Mercury', 2: 'unknown', 3: 'Earth'}; Update value for known key value 2. planetsFromSun.update(2, (value) => 'Venus'); print(planetsFromSun); {1: Mercury, 2: Venus, 3: Earth} final largestPlanets = <int, String>{1: 'Jupiter', 2: 'Saturn', 3: 'Neptune'}; Key value 8 is missing from list, add it using [ifAbsent]. largestPlanets.update(8, (value) => 'New', ifAbsent: () => 'Mercury'); print(largestPlanets); {1: Jupiter, 2: Saturn, 3: Neptune, 8: Mercury} ```"/>