public void setProtocol(String protocol) {
            this.protocol = protocol;
        }
Sets the protocol that this connection should use, such as "vnc"
or "rdp".

@param protocol
    The name of the protocol to use, such as "vnc" or "rdp".
extensions/guacamole-auth-json/src/main/java/org/apache/guacamole/auth/json/user/UserData.java