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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def vserver_add(v_name, v_ip, v_port, v_type, **connection_args):
    '''
    Add a new lb vserver

    CLI Example:

    .. code-block:: bash

        salt '*' netscaler.vserver_add 'vserverName' 'vserverIP' 'vserverPort' 'vserverType'
        salt '*' netscaler.vserver_add 'alex.patate.chaude.443' '1.2.3.4' '443' 'SSL'
    '''
    ret = True
    if vserver_exists(v_name, **connection_args):
        return False
    nitro = _connect(**connection_args)
    if nitro is None:
        return False
    vserver = NSLBVServer()
    vserver.set_name(v_name)
    vserver.set_ipv46(v_ip)
    vserver.set_port(v_port)
    vserver.set_servicetype(v_type.upper())
    try:
        NSLBVServer.add(nitro, vserver)
    except NSNitroError as error:
        log.debug('netscaler module error - NSLBVServer.add() failed: %s', error)
        ret = False
    _disconnect(nitro)
    return ret