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

		const editor = this.instantiationService.createInstance(DiffEditorWidget, editorContainer, {
			...fixedDiffEditorOptions,
			padding: {
				top: 24,
				bottom: 12
			},
			overflowWidgetsDomNode: this.notebookEditor.getOverflowContainerDomNode(),
			originalEditable: false,
			ignoreTrimWhitespace: false,
			automaticLayout: false,
			dimension: {
				height: 0,
				width: 0
			}
		}, {
			originalEditor: getOptimizedNestedCodeEditorWidgetOptions(),
			modifiedEditor: getOptimizedNestedCodeEditorWidgetOptions()
		});

		return {
			editor,
			editorContainer
		};
	}