112     private final Map<String, Connection> mConnectionById = new ConcurrentHashMap<>();  field in ConnectionService
827         if (mConnectionById.containsKey(callId)) {  in disconnect()
836         if (mConnectionById.containsKey(callId)) {  in hold()
845         if (mConnectionById.containsKey(callId)) {  in unhold()
854         if (mConnectionById.containsKey(callId)) {  in onCallAudioStateChanged()
865         if (mConnectionById.containsKey(callId)) {  in playDtmfTone()
874         if (mConnectionById.containsKey(callId)) {  in stopDtmfTone()
1006         if (mConnectionById.containsKey(callId)) {  in handleExtrasChanged()
1200         return mConnectionById.values();  in getAllConnections()
1362         mConnectionById.put(callId, connection);  in addConnection()
1374             mConnectionById.remove(id);  in removeConnection()
1409         if (mConnectionById.containsKey(callId)) {  in findConnectionForAction()
1410             return mConnectionById.get(callId);  in findConnectionForAction()