public Tunnel withTunnelId(String tunnelId) {
        setTunnelId(tunnelId);
        return this;
    }
<p>
A unique alpha-numeric ID that identifies a tunnel.
</p>

@param tunnelId
       A unique alpha-numeric ID that identifies a tunnel.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-iotsecuretunneling/src/main/java/com/amazonaws/services/iotsecuretunneling/model/Tunnel.java