src/vs/editor/browser/viewParts/viewZones/viewZones.ts/ViewZones/shouldSuppressMouseDownOnViewZone
class ViewZones:	public shouldSuppressMouseDownOnViewZone(id: string): boolean {
		if (this._zones.hasOwnProperty(id)) {
			const zone = this._zones[id];
			return Boolean(zone.delegate.suppressMouseDown);
		}
		return false;
	}