src/vs/base/common/resources.ts/ExtUri/isEqual
class ExtUri:	isEqual(uri1: URI | undefined, uri2: URI | undefined, ignoreFragment: boolean = false): boolean {
		if (uri1 === uri2) {
			return true;
		}
		if (!uri1 || !uri2) {
			return false;
		}
		return this.getComparisonKey(uri1, ignoreFragment) === this.getComparisonKey(uri2, ignoreFragment);
	}