$onlyIf
Usage:
$onlyIf[condition;error message (optional)$onlyIf[value1(<=/>=/==/</>/!=)value2;error message]Example:
$ping
$onlyIf[2<1;2 is not smaller than 1]Last updated
$onlyIf[condition;error message (optional)$onlyIf[value1(<=/>=/==/</>/!=)value2;error message]$ping
$onlyIf[2<1;2 is not smaller than 1]Last updated