API Reference > imodeljs-backend > iModels > IModelTransformer > onExportElementUniqueAspect onExportElementUniqueAspect MethodProtected Override of IModelExportHandler.onExportElementUniqueAspect that imports an ElementUniqueAspect into the target iModel when it is exported from the source iModel. This override calls IModelTransformer.onTransformElementAspect and then IModelImporter.importElementUniqueAspect to update the target iModel. onExportElementUniqueAspect(sourceAspect: ElementUniqueAspect): void Parameter Type Description sourceAspect ElementUniqueAspect Returns - void Defined in core/backend/src/IModelTransformer.ts Line 526 Last Updated: 13 June, 2024