_MailSettings
= _MailSettings()->FilterSettingsAt(index);
BMailProtocolSettings* protocolSettings = _MailSettings();
int32 index = _MailSettings()->AddFilterSettings(&ref);
ref, fAccount, _MailSettings()->FilterSettingsAt(index))));
_MailSettings()->RemoveFilterSettings(index);
if (!_MailSettings()->MoveFilterSettings(from, to)) {
BMailAddOnSettings* settings = _MailSettings()->FilterSettingsAt(index);
BMailProtocolSettings* _MailSettings();