Header parts:
PVR_ERROR GetProvidersAmount(int& amount) override;
PVR_ERROR GetProviders(kodi::addon::PVRProvidersResultSet& results) override;
PVR_ERROR GetChannelsAmount(int& amount) override;
PVR_ERROR GetChannels(bool radio, kodi::addon::PVRChannelsResultSet& results) override;
PVR_ERROR GetChannelStreamProperties(const kodi::addon::PVRChannel& channel, std::vector<kodi::addon::PVRStreamProperty>& properties) override;
PVR_ERROR GetSignalStatus(int channelUid, kodi::addon::PVRSignalStatus& signalStatus) override;
PVR_ERROR GetDescrambleInfo(int channelUid, kodi::addon::PVRDescrambleInfo& descrambleInfo) override;