'Add cmdline arguments for the specified kernel.
:param kernel: can be a position number (index) or title
:param args: argument to be added to the current list of args'

def add_args(self, kernel, args):

    entry_selection = self._get_entry_selection(kernel)
    command_arguments = [('--update-kernel=%s' % entry_selection), ('--args=%s' % args)]
    self._run_grubby_get_return(command_arguments)
