my %methods = (
...
findGroups => {
    endpoint => 'https://xxx.xxx.xxx.xxx:xxxx/grouper-ws/services/GrouperService.GrouperServiceHttpSoap12Endpoint/',
    soapaction => 'urn:findGroups',
    namespace => 'http://soap.ws.grouper.middleware.internet2.edu/xsd',
    parameters => [
      SOAP::Data->new(name => 'clientVersion', type => 'xs:string', attr => {}),
      SOAP::Data->new(name => 'wsQueryFilter', type => 'ns:WsQueryFilter', 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
  }, # end findGroups
); # end my %methods

##</code><code>##

  my $xml = "<ns:wsQueryFilter><ns:groupName>$params{groupname}</ns:groupName><ns:queryFilterType>$params{queryfiltertype}</ns:queryFilterType></ns:wsQueryFilter>";
  my $elem = SOAP::Data->type('xml' => $xml);

  my $result= $grouper->findGroups($params{clientversion},
                                   $elem,
                                   '',
                                   'T'
                                  );

##</code><code>##

  <soap:Body>
    <ns:findGroups>
      <clientVersion xsi:type="xs:string">v1_4_001</clientVersion>
      <wsQueryFilter xsi:nil="true" xsi:type="ns:WsQueryFilter" />
      <actAsSubjectLookup xsi:nil="true" xsi:type="ns:WsSubjectLookup" />
      <includeGroupDetail xsi:type="xs:string">T</includeGroupDetail>
    </ns:findGroups>
  </soap:Body>