- <para><function>sd_bus_message_set_destination()</function> sets the destination service name for the specified bus
- message object. The specified name must be a valid unique or well-known service name.</para>
+ <para><function>sd_bus_message_set_destination()</function> sets the destination service name
+ for the specified bus message object. The specified name must be a valid unique or well-known
+ service name.</para>
+
+ <para><function>sd_bus_message_get_destination()</function>,
+ <function>sd_bus_message_get_path()</function>,
+ <function>sd_bus_message_get_interface()</function>, and
+ <function>sd_bus_message_get_member()</function> return the destination, path, interface, and
+ member fields from <parameter>message</parameter> header. The return value will be
+ <constant>NULL</constant> is <parameter>message</parameter> is <constant>NULL</constant> or the
+ message is of a type that doesn't use those fields or the message doesn't have them set. See
+ <citerefentry><refentrytitle>sd_bus_message_new_method_call</refentrytitle><manvolnum>3</manvolnum></citerefentry> and
+ <citerefentry><refentrytitle>sd_bus_message_set_destination</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ for more discussion of those values.</para>