if (_objects.find(path) == _objects.end()) {
SG_LOG(SG_GENERAL, SG_ALERT, "Trying to enable/disable "
"non-existent menu item for node `" << path << '\'');
if (_objects.find(path) == _objects.end()) {
SG_LOG(SG_GENERAL, SG_ALERT, "Trying to enable/disable "
"non-existent menu item for node `" << path << '\'');