of @var{method}. @var{handler} must return a list, which elements are
used as arguments for the reply message of @var{method}. This list
can be composed like the input parameters in @ref{Type Conversion}.
+If only one Lisp object is returned, and this object is not a consp,
+then @var{handler} can return this object directly, instead of of list
+of this object.
The default D-Bus timeout when waiting for a message reply is 25
seconds. This value could be even smaller, depending on the calling