code: def create(cls, name, nat=False, mobile_vpn_toplogy_mode=None,
                 vpn_profile=None):
          
          vpn_profile = element_resolver(vpn_profile) or \
              VPNProfile('VPN-A Suite').href
          
          json = {'mobile_vpn_topology_mode': mobile_vpn_toplogy_mode,
                  'name': name,
                  'nat': nat,
                  'vpn_profile': vpn_profile}
  
          try:
              return ElementCreator(cls, json)
          except CreateElementFailed as err:
              raise CreatePolicyFailed(err)
docs: Create a new policy based VPN
  
          :param name: name of vpn policy
          :param bool nat: whether to apply NAT to the VPN (default False)
          :param mobile_vpn_toplogy_mode: whether to allow remote vpn
          :param VPNProfile vpn_profile: reference to VPN profile, or uses default
          :rtype: PolicyVPN