I think there's mistake of the parser.
class SerialCommunicator{
public:
void SerialCommunicator(XXXX);
};
For these kind of statement, thereās two tokens (the class declaration and the constructor) should be added. So, the function tooltip should match two entries in the token tree.
You can select the "SerialCommunicator", and right click, and select context menu: see deceleration of "SerialCommunicator".