my $result = $xmlrpc->call( 'examples.getStateStruct',
                        { state1 => 12, state2 => 28 } );

##</code><code>##

 my $result = $xmlrpc->call('examples.getStateStruct',
          { state1 => sub { {i4 => 12} }, state2 => 28 }

##</code><code>##

$xmlrpc->call( 'method_name',
   { name => sub { {'base64' => encode_base64($data)} } } );

##</code><code>##

$xmlrpc->call(..., { name => sub { {boolean => $value} } });