<itemvalue="Return the presentation of this type as it should appear when presented to users in contexts such as error messages. If [withNullability] is `true`, then [NullabilitySuffix.question] and [NullabilitySuffix.star] will be be represented as `?` and ``. [NullabilitySuffix.none] does not have any explicit presentation. If [withNullability] is `false`, nullability suffixes will not be included into the presentation. Clients should not depend on the content of the returned value as it will be changed if doing so would improve the UX."/>
<itemvalue="Wrap [generator] as a [Builder] that generates Dart library files. [generatedExtension] indicates what files will be created for each `.dart` input. Defaults to `.g.dart`, however this should usually be changed to avoid conflicts with outputs from a [SharedPartBuilder]. If [generator] will create additional outputs through the [BuildStep] they should be indicated in [additionalOutputExtensions]. [formatOutput] is called to format the generated code. Defaults to [DartFormatter.format]. [header] is used to specify the content at the top of each generated file. If `null`, the content of [defaultFileHeader] is used. If [header] is an empty `String` no header is added. [allowSyntaxErrors] indicates whether to allow syntax errors in input libraries."/>
<itemvalue="A builder that positions the [firstChild] and [secondChild] widgets. The widget returned by this method is wrapped in an [AnimatedSize]. By default, this uses [AnimatedCrossFade.defaultLayoutBuilder], which uses a [Stack] and aligns the `bottomChild` to the top of the stack while providing the `topChild` as the non-positioned child to fill the provided constraints. This works well when the [AnimatedCrossFade] is in a position to change size and when the children are not flexible. However, if the children are less fussy about their sizes (for example a [CircularProgressIndicator] inside a [Center]), or if the [AnimatedCrossFade] is being forced to a particular size, then it can result in the widgets jumping about when the cross-fade state is changed."/>
<itemvalue="Typically, the Directionality widget is introduced by the MaterialApp or WidgetsApp widget at the top of your application widget tree. It determines the ambient reading direction and is used, for example, to determine how to lay out text, how to interpret "start" and "end" values, and to resolve EdgeInsetsDirectional, AlignmentDirectional, and other Directional objects. Instead of providing a Directionality widget, another solution would be passing a non-directional 'alignment', or an explicit 'textDirection', to the Stack."/>
<itemvalue="Returns true if [this] occurs at the same moment as [other]. The comparison is independent of whether the time is in UTC or in the local time zone. ```dart var now = DateTime.now(); var later = now.add(const Duration(seconds: 5)); assert(!later.isAtSameMomentAs(now)); assert(now.isAtSameMomentAs(now)); This relation stays the same, even when changing timezones. assert(!later.isAtSameMomentAs(now.toUtc())); assert(!later.toUtc().isAtSameMomentAs(now)); assert(now.toUtc().isAtSameMomentAs(now)); assert(now.isAtSameMomentAs(now.toUtc())); ```"/>
<itemvalue="bar Width"/>
<itemvalue="is Curved"/>
<itemvalue="[x] determines cartesian (axis based) horizontally position 0 means most left point of the chart"/>
<itemvalue="[y] determines cartesian (axis based) vertically position 0 means most bottom point of the chart"/>
<itemvalue="Fl Spot"/>
<itemvalue="navigate"/>
<itemvalue="prevent"/>
<itemvalue="magnification"/>
<itemvalue="diameter Ratio"/>
<itemvalue="squeeze"/>
<itemvalue="A default selection overlay for [CupertinoPicker]s. It draws a gray rounded rectangle to match the picker visuals introduced in iOS 14. This widget is typically only used in [CupertinoPicker.selectionOverlay]. In an iOS 14 multi-column picker, the selection overlay is a single rounded rectangle that spans the entire multi-column picker. To achieve the same effect using [CupertinoPickerDefaultSelectionOverlay], the additional margin and corner radii on the left or the right side can be disabled by turning off [capLeftEdge] and [capRightEdge], so this selection overlay visually connects with selection overlays of adjoining [CupertinoPicker]s (i.e., other "column"s). See also: [CupertinoPicker], which uses this widget as its default [CupertinoPicker.selectionOverlay]."/>
<itemvalue="Creates an iOS 14 style selection overlay that highlights the magnified area (or the currently selected item, depending on how you described it elsewhere) of a [CupertinoPicker]. The [background] argument default value is [CupertinoColors.tertiarySystemFill]. It must be non-null. The [capLeftEdge] and [capRightEdge] arguments decide whether to add a default margin and use rounded corners on the left and right side of the rectangular overlay. Default to true and must not be null."/>
<itemvalue="Evaluates a JavaScript expression in the context of the current page. On Android returns the evaluation result as a JSON formatted string. On iOS depending on the value type the return value would be one of: - For primitive JavaScript types: the value string formatted (e.g JavaScript 100 returns '100'). - For JavaScript arrays of supported types: a string formatted NSArray(e.g '(1,2,3), note that the string for NSArray is formatted and might contain newlines and extra spaces.'). - Other non-primitive types are not supported on iOS and will complete the Future with an error. The Future completes with an error if a JavaScript error occurred, or on iOS, if the type of the evaluated expression is not supported as described above. When evaluating Javascript in a [WebView], it is best practice to wait for the [WebView.onPageFinished] callback. This guarantees all the Javascript embedded in the main frame HTML has been loaded."/>
