src/vs/workbench/contrib/search/common/cacheState.ts/FileQueryCacheState/cacheKey
class FileQueryCacheState:	get cacheKey(): string {
		if (this.loadingPhase === LoadingPhase.Loaded || !this.previousCacheState) {
			return this._cacheKey;
		}

		return this.previousCacheState.cacheKey;
	}