Serializes @message to a blob. The byte order returned by g_dbus_message_get_byte_order() will be used.
A #GDBusCapabilityFlags describing what protocol features are supported.
A pointer to a valid binary D-Bus message of @out_size bytes generated by @message or %NULL if @error is set. Free with g_free().
GException on failure.
2.26
See Implementation
Serializes @message to a blob. The byte order returned by g_dbus_message_get_byte_order() will be used.