extensions/json-language-features/client/src/node/schemaCache.ts/JSONSchemaCache/clearCache
class JSONSchemaCache:	public async clearCache(): Promise<string[]> {
		const uris = Object.keys(this.cacheInfo);
		try {
			const files = await fs.readdir(this.schemaCacheLocation);
			for (const file of files) {
				try {
					await fs.unlink(path.join(this.schemaCacheLocation, file));
				} catch (_e) {
					// ignore
				}
			}
		} catch (e) {
			// ignore
		} finally {

			this.cacheInfo = {};
			await this.updateMemento();
		}
		return uris;
	}