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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 create(cls, name, vss_def=None):
 """ Create a VSS Container. This maps to the Service Manager within NSX. vss_def is optional and has the following definition: {"isc_ovf_appliance_model": 'virtual', "isc_ovf_appliance_version": '', "isc_ip_address": '192.168.4.84', # IP of manager, i.e. OSC "isc_vss_id": '', "isc_virtual_connector_name": 'smc-python'} :param str name: name of container :param dict vss_def: dict of optional settings :raises CreateElementFailed: failed creating with reason :rtype: VSSContainer """

        vss_def = {} if vss_def is None else vss_def
        json = {
            'master_type': 'dcl2fw',
            'name': name,
            'vss_isc': vss_def
        }
        return ElementCreator(cls, json)