Perl6::Form formatting question

[ugly]

Hello,

In Perl6::Form, is there any way to use a block field, but make the last
line formatted differently from the preceding lines? i.e. have something
like this:

print form
"AA {]]]]]]]]]]]]]]]]]]:} AA",
$blah,
"BB {:>>>>>>>>>>>>>>>>>>} BB",
$blah;

Thanks,

ugly