$onlyIf
$onlyIf will check for a condition and return a error message if that condition does not match.
Usage
$onlyIf[condition;error]Parameters
| Field | Type | Description | Required | 
|---|---|---|---|
| condition | string | Condition to check. | true | 
| error | string | Error to return when condition does not match. | false | 
Example(s)
This will return the error message as 5 does not equal to 3:
1client.command({2    name: "onlyIf",3    code: `4    Ok.5    $onlyIf[5==3;That's wrong!]6    `7});