$param = [] if !defined($param);
$param = [ $param ] if !ref($param);
$param = [@$param, '--output-format=json'] if !$no_output;
do_raw_client_cmd(
$param = [] if !defined($param);
$param = [ $param ] if !ref($param);
$param = [@$param, '--output-format=json'] if !$no_output;
do_raw_client_cmd(