Mine

<node name='/search'>
  <interface name='org.freedesktop.DBus.Introspectable'>
    <method name='Introspect'>
      <arg name='xml_data' type='s' direction='out'/>
    </method>
  </interface>
  <interface name='vandenoever.dbustest'>
    <method name='upload'>
      <arg name='upload' type='ay' direction='in'/>
      <arg name='out' type='b' direction='out'/>
    </method>
    <method name='helloWorld'>
      <arg name='name' type='s' direction='in'/>
      <arg name='out' type='s' direction='out'/>
    </method>
  </interface>
  <interface name='vandenoever.strigi'>
    <method name='getStatus'>
      <arg name='out' type='a{ss}' direction='out'/>
    </method>
    <method name='isActive'>
      <arg name='out' type='b' direction='out'/>
    </method>
    <method name='setIndexedDirectories'>
      <arg name='d' type='as' direction='in'/>
      <arg name='out' type='s' direction='out'/>
    </method>
    <method name='getIndexedDirectories'>
      <arg name='out' type='as' direction='out'/>
    </method>
    <method name='stopIndexing'>
      <arg name='out' type='s' direction='out'/>
    </method>
    <method name='getHits'>
      <arg name='query' type='s' direction='in'/>
      <arg name='max' type='i' direction='in'/>
      <arg name='offset' type='i' direction='in'/>
      <arg name='out' type='a(sdsssxxa{ss})' direction='out'/>
    </method>
    <method name='startIndexing'>
      <arg name='out' type='s' direction='out'/>
    </method>
    <method name='countHits'>
      <arg name='query' type='s' direction='in'/>
      <arg name='out' type='i' direction='out'/>
    </method>
    <method name='stopDaemon'>
      <arg name='out' type='s' direction='out'/>
    </method>
  </interface>
</node>