code: public VpnConnectionOptionsSpecification withTunnelOptions(VpnTunnelOptionsSpecification... tunnelOptions) {
          if (this.tunnelOptions == null) {
              setTunnelOptions(new com.amazonaws.internal.SdkInternalList<VpnTunnelOptionsSpecification>(tunnelOptions.length));
          }
          for (VpnTunnelOptionsSpecification ele : tunnelOptions) {
              this.tunnelOptions.add(ele);
          }
          return this;
      }
docs: <p>
  The tunnel options for the VPN connection.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setTunnelOptions(java.util.Collection)} or {@link #withTunnelOptions(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param tunnelOptions
  The tunnel options for the VPN connection.
  @return Returns a reference to this object so that method calls can be chained together.