src/vs/workbench/contrib/notebook/browser/diff/notebookTextDiffList.ts/CellDiffSingleSideRenderer/_buildSourceEditor
class CellDiffSingleSideRenderer:	private _buildSourceEditor(sourceContainer: HTMLElement) {
		const editorContainer = DOM.append(sourceContainer, DOM.$('.editor-container'));

		const editor = this.instantiationService.createInstance(CodeEditorWidget, editorContainer, {
			...fixedEditorOptions,
			dimension: {
				width: (this.notebookEditor.getLayoutInfo().width - 2 * DIFF_CELL_MARGIN) / 2 - 18,
				height: 0
			},
			automaticLayout: false,
			overflowWidgetsDomNode: this.notebookEditor.getOverflowContainerDomNode()
		}, {});

		return editor;
	}