Chain of Command - avoiding the next call

This is possibly something that needs to be used very sparingly if at all, but apparently there is a way (up until the latest version - v8.1) to avoid calling the next() call when using chain of command.

The key is to use double nested conditions:

//this will not work "call to 'next' should be done only once and unconditionally"

    protected void chooseLinesPackingSlip(boolean _append)

    {

       If (true)

{

           this.somethingElse(_append);

           return;

       }

       next chooseLinesPackingSlip(_append);

    }

//this will work

    protected void chooseLinesPackingSlip(boolean _append)

    {

       If (true)

{

    if (true)

    {

               this.somethingElse(_append);

               return;

           }

       }

       next chooseLinesPackingSlip(_append);

    }