$tree->fid('owner')->edit_href(sub{s/owner_id/$args{owner}/});
$tree->fid('job_log')->edit_href(sub{s/problem_id/$args{id}/});
$tree->fid('solution')->edit_href(sub{s/problem_id/$args{id}/});
$tree->fid('owner')->edit_href(sub{s/owner_id/$args{owner}/});
$tree->fid('job_log')->edit_href(sub{s/problem_id/$args{id}/});
$tree->fid('solution')->edit_href(sub{s/problem_id/$args{id}/});