src/vs/workbench/contrib/remote/browser/tunnelView.ts/TunnelItem/tooltipPostfix
class TunnelItem:	get tooltipPostfix(): string {
		let information: string;
		if (this.localAddress) {
			information = nls.localize('remote.tunnel.tooltipForwarded', "Remote port {0}:{1} forwarded to local address {2}. ", this.remoteHost, this.remotePort, this.localAddress);
		} else {
			information = nls.localize('remote.tunnel.tooltipCandidate', "Remote port {0}:{1} not forwarded. ", this.remoteHost, this.remotePort);
		}

		return information;
	}