src/vs/workbench/contrib/notebook/browser/diff/notebookDiffEditor.ts/NotebookTextDiffEditor/_registerOverviewRuler
class NotebookTextDiffEditor:	private _registerOverviewRuler() {
		this._overviewRuler = this._register(this.instantiationService.createInstance(NotebookDiffOverviewRuler, this, NotebookTextDiffEditor.ENTIRE_DIFF_OVERVIEW_WIDTH, this._overviewRulerContainer!));
	}