docs: public DescribeVpnConnectionsResult withVpnConnections(VpnConnection... vpnConnections) {
          if (this.vpnConnections == null) {
              setVpnConnections(new com.amazonaws.internal.SdkInternalList<VpnConnection>(vpnConnections.length));
          }
          for (VpnConnection ele : vpnConnections) {
              this.vpnConnections.add(ele);
          }
          return this;
      }