isUpgradeToVideoModeRecvOnly method
Returns true if account with specified id has 'upgradeToVideo' set to 'RecvOnly'
Implementation
@override
bool isUpgradeToVideoModeRecvOnly(String uri) {
int index = _accounts.indexWhere((a) => a.uri == uri);
return (index == -1) ||
(_accounts[index].upgradeToVideo == null) ||
(_accounts[index].upgradeToVideo == UpgradeToVideoMode.RecvOnly);
}