+bool
+PortManager::physically_connected (const string& port_name)
+{
+ if (!_backend) {
+ return false;
+ }
+
+ PortEngine::PortHandle handle = _backend->get_port_by_name (port_name);
+
+ if (!handle) {
+ return false;
+ }
+
+ return _backend->physically_connected (handle);
+}
+
+int
+PortManager::get_connections (const string& port_name, std::vector<std::string>& s)
+{
+ if (!_backend) {
+ s.clear ();
+ return 0;
+ }
+
+ PortEngine::PortHandle handle = _backend->get_port_by_name (port_name);
+
+ if (!handle) {
+ s.clear ();
+ return 0;
+ }
+
+ return _backend->get_connections (handle, s);
+}
+