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$fm->{ua}->add_handler("request_send",  sub { shift->dump; return });
$fm->{ua}->add_handler("response_done", sub { shift->dump; return });

$fm->{ua}->add_handler("request_send",  \&pp_dump );
$fm->{ua}->add_handler("response_done", \&pp_dump );
...
    print $_[0]->as_string,"\n";
    return;
}