static ELandscapeImportResult GetHeightmapImportData ( const [FLandscapeImportDescriptor](API\Editor\LandscapeEditor\FLandscapeImportDescriptor) & ImportDescriptor, int32 DescriptorIndex, [TArray](API\Runtime\Core\Containers\TArray)< uint16 > & OutData, [FText](API\Runtime\Core\Internationalization\FText) & OutMessage )