src/vs/base/common/resources.ts/ExtUri/compare
class ExtUri:	compare(uri1: URI, uri2: URI, ignoreFragment: boolean = false): number {
		if (uri1 === uri2) {
			return 0;
		}
		return strCompare(this.getComparisonKey(uri1, ignoreFragment), this.getComparisonKey(uri2, ignoreFragment));
	}