isLibLegacy() {
		try {
			const pkg = require("nats/package.json");
			const installedVersion = pkg.version;
			this.logger.info("NATS lib version:", installedVersion);
			return installedVersion.split(".")[0] == 1;
		} catch (err) {
			this.logger.warn("Unable to detect NATS library version.", err.message);
		}
	}
Check the installed NATS library version. v1.x.x - legacy
@returns {Boolean}