src/vs/workbench/services/configurationResolver/common/variableResolver.ts/AbstractVariableResolverService/resolveAsync
class AbstractVariableResolverService:	public async resolveAsync(root: IWorkspaceFolder | undefined, value: any): Promise<any> {
		const environment: Environment = {
			env: await this._envVariablesPromise,
			userHome: await this._userHomePromise
		};
		return this.recursiveResolve(environment, root ? root.uri : undefined, value);
	}