Are method / signal definitions case sensitive?

[mhneifer]

I tried to extend one of the examples with a signal definition as follows.

@dbus_interface("org.example.HelloWorld")
class HelloWorld:

    def Hello(self, name: Str) -> Str:
        return f"Hello {name}!"

    @dbus_signal
    def calculationDone(self, requestId: Int32, frameNo: UInt32, probabilities: List[Double]):
        pass

print(HelloWorld.__dbus_xml__)

However, the signal is not shown in the XML definition. After some try and error, I found that the signal is shown if the method starts with an upper case letter. So, CalculationDone() is shown in the XML definition.

Is there any way to define a signal that starts with a lower case letter?

Thanks in advance.