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Need enlightenment on bug 318998; Add option to exit after printing

Hello, I'm working on a bug in okular https://bugs.kde.org/show_bug.cgi?id=318998 and I'm unable to develop the clear understanding of the bug. Here is my question:

1. What does the issue actually mean - adding an option to automatically exit with
the exit code and message after acknowledging the print dialog when launched
with --print parameter or adding a separate parameter option as
--print_and_exit that do the same? Or is it something different? Confuse
between improving an existing parameter or adding a new parameter for the same.

2. Regarding the point 1, should the print dialog being shown or should it be without any GUI as the command line batch processing is specifically mentioned in the bug? 

Thanks and Regards,