$setPrefixVar
Changes the current prefix value to another (if 'prefix' variable exists)
Usage
$setPrefixVar[value;guildID?]
Example
client.command({
name: "set-prefix",
code: `
Changed the prefix to '?'
$setPrefixVar[?]
`
});
:::disclaimer You'll need to add 'prefix' variable into your variable list before using this function for avoiding possible errors!