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Alexandre Ardhuin authored
* migrate widget to nullsafety * remove double blank line after license * address review comments in actions.dart * nullable ObjectKey.value * use local variable oldElement * make State.build non-nullable * make State.context non-nullable * newline at eof * make ProxyWidget.child non-nullable * make _InactiveElements.debugContains non-nullable * make Element.depth non-nullable * make ProxyElement.build non-nullable * make StatefulElement.state non-nullable * remove 'Notice that' * avoid cast of list in RenderObjectElement.updateChildren * make IndexedSlot.value non-nullable * avoid cast of list in MultiChildRenderObjectElement.mount * make some WidgetsApp parameters non-nullable * hitTest take non-nullable position * make ScrollableState.position non-nullable * use _pixels instead of pixels * make ViewportOffset.pixels non-nullable * make param and return type of IndexedWidgetBuilder non-nullable * unused_import * make context param non-nullable for Builder in animated_list.dart * make ScrollMetrics.viewportDimension non-nullable * make ScrollMetrics.{min,max}ScrollExtent non-nullable * make _Location.file non-nullable * _WidgetForTypeTests.createElement throw UnimplementedError * update _NullWidget.build error message * make _ShortcutsState.manager non-nullable * Fix childCount issues for NNBD * fix childCount computation on web * increase max value on js side to compute childCount * make aspect parameter of dependOnInheritedWidgetOfExactType nullable * merge has{min,max}ScrollExtent into hasScrollExtents * update focus_manager.dart * address review comments in icon.dart * address review comments in image.dart * address review comments in routes.dart * address review comments in scroll_activity.dart * update doc comments * make UserScrollNotification.direction non-nullable and required * rename hasScrollExtents to hasContentDimensions * unnecessary late Co-authored-by:Ian Hickson <ian@hixie.ch>
