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src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts

@@ -150,8 +150,8 @@ export class TestNotebookEditor implements INotebookEditor {
 	revealInCenterIfOutsideViewport(cell: CellViewModel): void {
 		throw new Error('Method not implemented.');
 	}
-	async insertNotebookCell(cell: CellViewModel, type: CellKind, direction: 'above' | 'below'): Promise<void> {
-		// throw new Error('Method not implemented.');
+	async insertNotebookCell(cell: CellViewModel, type: CellKind, direction: 'above' | 'below'): Promise<CellViewModel> {
+		throw new Error('Method not implemented.');
 	}
 	deleteNotebookCell(cell: CellViewModel): void {
 		// throw new Error('Method not implemented.');