[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SDockTab](API\Runtime\Slate\Widgets\Docking\SDockTab) > OpenDocument ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * DocumentID, [FDocumentTracker::EOpenDocumentCause](API\Editor\UnrealEd\WorkflowOrientedApp\FDocumentTracker\EOpenDocumentCause) Cause )