src/vs/platform/sign/node/signService.ts/SignService/validate
class SignService:	async validate(message: IMessage, value: string): Promise<boolean> {
		if (!message.id) {
			return true;
		}

		const validator = this.validators.get(message.id);
		if (!validator) {
			return false;
		}
		this.validators.delete(message.id);
		try {
			return (validator.validate(value) === 'ok');
		} catch (e) {
			// ignore errors silently
			return false;
		}
	}