src/vs/workbench/api/common/extHostLanguageFeatures.ts/NavigateTypeAdapter/releaseWorkspaceSymbols
class NavigateTypeAdapter:	releaseWorkspaceSymbols(id: number): any {
		const range = this._resultCache.get(id);
		if (range) {
			for (let [from, to] = range; from <= to; from++) {
				this._symbolCache.delete(from);
			}
			this._resultCache.delete(id);
		}
	}