virtual [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FDragDropOperation](API\Runtime\SlateCore\Input\FDragDropOperation) > InitiateDrag ( [TArray](API\Runtime\Core\Containers\TArray)< [TWeakViewModelPtr](API\Editor\SequencerCore\TWeakViewModelPtr)< [IOutlinerExtension](API\Editor\SequencerCore\MVVM\Extensions\IOutlinerExtension) >> && InDraggedModels )