src/vs/workbench/services/configuration/browser/configuration.ts/CachedWorkspaceConfiguration/updateWorkspace
class CachedWorkspaceConfiguration:	async updateWorkspace(workspaceIdentifier: IWorkspaceIdentifier, content: string | undefined): Promise<void> {
		try {
			const key = this.getKey(workspaceIdentifier);
			if (content) {
				await this.configurationCache.write(key, JSON.stringify({ content }));
			} else {
				await this.configurationCache.remove(key);
			}
		} catch (error) {
		}
	}