InfcNotePlugin
typedef struct {
gpointer user_data;
const gchar* note_type;
InfSession*(*session_new)(InfIo* io,
InfCommunicationManager* manager,
InfSessionStatus status,
InfCommunicationJoinedGroup* sync_group,
InfXmlConnection* sync_connection,
gpointer user_data);
} InfcNotePlugin;