Warning, /plasma-mobile/plasma-dialer/kde-telephony-meta/dbus-xmls/manual/org.kde.telephony.VoiceMailUtils.xml is written in an unsupported language. File is not indexed.

 <!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
 <node>
   <interface name="org.kde.telephony.VoiceMailUtils">
     <method name="getVoicemailNumber">
       <arg type="s" direction="out"/>
     </method>
   </interface>
 </node>