parameters => [
      SOAP::Data->new(name => 'clientVersion', type => 'xs:string', attr => {}),
      SOAP::Data->new(name => 'wsQueryFilter', type =>
                      \SOAP::Data->value(
                                         SOAP::Data->name(name => 'groupAttributeName', type =>'xs:string'),
                                         ...
                                        )
                      , attr => {}
                     ),
      SOAP::Data->new(name => 'actAsSubjectLookup', type => 'ns:WsSubjectLookup', attr => {}),
      SOAP::Data->new(name => 'includeGroupDetail', type => 'xs:string', attr => {}),
      SOAP::Data->new(name => 'params', type => 'ns:WsParam', attr => {}),
    ], # end parameters