unhideCampaign method
Send unhide campaign message
Implementation
void unhideCampaign(String campaignId) {
final message = CampaignActionMessage(
action: 'unhide',
campaignId: campaignId,
);
print('📤 QA Message Service: Broadcasting unhide campaign message');
print(' Campaign ID: $campaignId');
_campaignActionController.add(message);
}