GetTimeSource
status_t GetTimeSource(media_node* _node);
status = fMediaRoster->GetTimeSource(&fTimeSourceNode);
status_t err = m_manager->roster->GetTimeSource(&ts);
err = m_manager->roster->GetTimeSource(&dacTimeSource);
r->GetTimeSource(&mTimeSource);
fStatus = fMediaRoster->GetTimeSource(&fTimeSource);
err = gMediaRoster->GetTimeSource(&time_node);
err = roster->GetTimeSource(&fConnection->timeSource);
BMediaRoster::Roster()->GetTimeSource(&timeSource);
BTimeSource* source = gTimeSourceObjectManager->GetTimeSource(clone);
fInitStatus = roster->GetTimeSource(&timeSource);
BTimeSource* GetTimeSource(const media_node& node);
fRoster->GetTimeSource(×ource);