message to the peer represented by this.
flags contain the g_dbus_send_message_flags_preserve_serial flag, the serial number will
be assigned by this and set on
out_serial is not
null, then the serial number used will be written to this location prior to submitting the message to the underlying transport.
If this is closed then the operation will fail with g_io_error_closed. If
message is not well-formed, the operation fails with g_io_error_invalid_argument.
See this server and client for an example of how to use this low-level API to send and receive UNIX file descriptors.
message must be unlocked, unless
flags contain the
flags affecting how the message is sent
return location for serial number assigned to
true if the message was well-formed and queued for transmission, false if throws is set