src/vs/workbench/contrib/notebook/browser/diff/diffElementViewModel.ts/DiffElementViewModelBase/_fireLayoutChangeEvent
class DiffElementViewModelBase:	private _fireLayoutChangeEvent(state: CellDiffViewModelLayoutChangeEvent) {
		this._layoutInfoEmitter.fire(state);
		this.editorEventDispatcher.emit([{ type: NotebookDiffViewEventType.CellLayoutChanged, source: this._layoutInfo }]);
	}