<itemvalue="The reserved word `null` denotes an object that is the sole instance of this class. The `Null` class is the only class which does not implement `Object`. It is a compile-time error for a class to attempt to extend or implement [Null]. The language contains a number of specialized operators for working with `null` value. Examples: ```dart e1! Throws if e1 is null. e2 ?? e3 Same as e2, unless e2 is null, then use value of e3 x ??= e4 Same as x unless x is null, then same as `x = e4`. e5?.foo() call `foo` on e5, unless e5 is null. [...? e6] spreads e6 into the list literal, unless e6 is null. ```"/>
<itemvalue="Typically set to true when the [InputDecorator] contains a multiline [TextField] ([TextField.maxLines] is null or > 1) to override the default behavior of aligning the label with the center of the [TextField]. Defaults to false."/>
<itemvalue="The direction to use for the [hintText]. If null, defaults to a value derived from [Directionality] for the input field and the current context."/>
<itemvalue="Set the initial position at the position where this gesture recognizer won the arena."/>
@ -67,7 +68,6 @@
<itemvalue="{@macro flutter.widgets.list_view.prototypeItem} final Widget? prototypeItem;"/>
<itemvalue="This example demonstrates using the [ReorderableListView.proxyDecorator] callback to customize the appearance of a list item while it's being dragged."/>
<itemvalue="By default, on [TargetPlatformVariant.desktop] platforms each item will have a drag handle added on top of it that will allow the user to grab it to move the item. On [TargetPlatformVariant.mobile], no drag handle will be added, but when the user long presses anywhere on the item it will start moving the item. Displaying drag handles can be controlled with [ReorderableListView.buildDefaultDragHandles]."/>
<itemvalue="A list whose items the user can interactively reorder by dragging. {@youtube 560 315 https:www.youtube.comwatch?v=3fB1mxOsqJE} This sample shows by dragging the user can reorder the items of the list. The [onReorder] parameter is required and will be called when a child widget is dragged to a new position."/>