src/vs/editor/common/viewModel/overviewZoneManager.ts/OverviewZoneManager/setDOMWidth
class OverviewZoneManager:	public setDOMWidth(width: number): boolean {
		if (this._domWidth === width) {
			return false;
		}
		this._domWidth = width;
		this._colorZonesInvalid = true;
		return true;
	}