return values of org.ofono.SupplementaryServices.Initiate

Hi, doc/supplementaryservices-api.txt says nothing about return values of SupplementeryServices.Initiate method (or that the method can take SS requests in addition to USSD). Can the API designer/implementer fix this please? string, variant Initiate(string command) Sends a USSD command string to the network initiating a session. When the request is handled by the appropriate node of the network, the method returns the response or an appropriate error. The network may be awaiting further response from the ME after returning from this method and no new command can be initiated until this one is cancelled or ended. Possible Errors: [service].Error.Timedout Possible Errors: [service].Error.Canceled Regards, Alex