code: public void setVpnConnections(java.util.Collection<VpnConnection> vpnConnections) {
          if (vpnConnections == null) {
              this.vpnConnections = null;
              return;
          }
  
          this.vpnConnections = new com.amazonaws.internal.SdkInternalList<VpnConnection>(vpnConnections);
      }
docs: <p>
  Information about one or more VPN connections.
  </p>
  
  @param vpnConnections
  Information about one or more VPN connections.