<arg name="in" type="s" direction="in"/>
<arg name="out" type="s" direction="out"/>
</method>
+ <method name="once">
+ <arg name="in" type="s" direction="in"/>
+ <arg name="out" type="s" direction="out"/>
+ </method>
<method name="terminate">
<arg name="in" type="s" direction="in"/>
<arg name="out" type="s" direction="out"/>