[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SDockTab](API\Runtime\Slate\Widgets\Docking\SDockTab) > OpenDocument ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FTabPayload](API\Editor\UnrealEd\WorkflowOrientedApp\FTabPayload) > InPayload, [EOpenDocumentCause](API\Editor\UnrealEd\WorkflowOrientedApp\FDocumentTracker\EOpenDocumentCause) InOpenCause )