public static ICommandGroup GetOrCreateGroup(string prefix, CmdGroupInitializer groupInitializer = null)
{
prefix = prefix.ToLower();
CommandGroup group = instance.commandGroups.Find(x => x.Prefix == prefix);
if (group == null)
{
group = new CommandGroup(prefix);
instance.commandGroups.Add(group);
group.AddCommands(groupInitializer);
}
return(group);
}