src/vs/editor/browser/viewParts/viewZones/viewZones.ts/ViewZones/_heightInPixels
class ViewZones:	private _heightInPixels(zone: IViewZone): number {
		if (typeof zone.heightInPx === 'number') {
			return zone.heightInPx;
		}
		if (typeof zone.heightInLines === 'number') {
			return this._lineHeight * zone.heightInLines;
		}
		return this._lineHeight;
	}