virtual [FReply](API\Runtime\SlateCore\Input\FReply) BeginGraphDragAction ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FEdGraphSchemaAction](API\Runtime\Engine\EdGraph\FEdGraphSchemaAction) > InAction, const [FPointerEvent](API\Runtime\SlateCore\Input\FPointerEvent) & MouseEvent ) const