pub unsafe extern "C" fn CreateChannelObserver(
dataGroup: *const IDataGroup,
channelGroup: *const IChannelGroup,
channel: *const IChannel,
) -> *mut IChannelObserverpub unsafe extern "C" fn CreateChannelObserver(
dataGroup: *const IDataGroup,
channelGroup: *const IChannelGroup,
channel: *const IChannel,
) -> *mut IChannelObserver