Make a group be admincc of one ticket by scrip

RT Users
1

I have a scrip that uses the following custom action. This code means that add a constant user by email address "help@example.com" to the admincc list of one ticket:

my $admincclist = $self->TicketObj->AdminCc;
my $user = RT::User->new($RT::SystemUser);

 $user->LoadByEmail('help@example.com');
$admincclist->AddMember($user->Id);

I want to set a group be admincc instead of one user. how can I do it?