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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 get_vsan_cluster_config_system(service_instance):
    '''
    Returns a vim.cluster.VsanVcClusterConfigSystem object

    service_instance
        Service instance to the host or vCenter
    '''

    #TODO Replace when better connection mechanism is available

    #For python 2.7.9 and later, the defaul SSL conext has more strict
    #connection handshaking rule. We may need turn of the hostname checking
    #and client side cert verification
    context = None
    if sys.version_info[:3] > (2, 7, 8):
        context = ssl.create_default_context()
        context.check_hostname = False
        context.verify_mode = ssl.CERT_NONE

    stub = service_instance._stub
    vc_mos = vsanapiutils.GetVsanVcMos(stub, context=context)
    return vc_mos['vsan-cluster-config-system']