code: 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;
      }
docs: <p>
  Information about one or more VPN connections.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setVpnConnections(java.util.Collection)} or {@link #withVpnConnections(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param vpnConnections
  Information about one or more VPN connections.
  @return Returns a reference to this object so that method calls can be chained together.