If you did not override local_command_line() then these are the same
options that were parsed according to the GOptionEntrys added to the
application with Application.addMainOptionEntries and possibly
modified from your GApplication::handle-local-options handler.
If no options were sent then an empty dictionary is returned so that
you don't need to check for NULL.
Gets the options there were passed to Application.commandLine.
If you did not override local_command_line() then these are the same options that were parsed according to the GOptionEntrys added to the application with Application.addMainOptionEntries and possibly modified from your GApplication::handle-local-options handler.
If no options were sent then an empty dictionary is returned so that you don't need to check for NULL.