# searching
for my $provider ( @providers ) {
    $data->add_results( $provider->search( query=>$query, sorting=>{ col1=>'asc' } ) );
}

# group sorting
$data->sort( sub{ return $_[0]->{column} cmp $_[1]->{column} );

# paging
my $rs = $data->list_paged( page=>1, rows=>10 );
while( my $row = $rs->next ) {
     ...
}