src/vs/workbench/services/configuration/browser/configuration.ts/CachedRemoteUserConfiguration/updateConfiguration
class CachedRemoteUserConfiguration:	async updateConfiguration(content: string | undefined): Promise<void> {
		if (content) {
			return this.configurationCache.write(this.key, JSON.stringify({ content }));
		} else {
			return this.configurationCache.remove(this.key);
		}
	}