##
my $partner = $data{partners};
my $flow_id = $partner->{$part_id}{flow};
my $flows_ref = $data{flows}{$flow_id}};
for my $wfref (@$flows_ref) {
#...
}
##
##
my $flow_id = $data{partners}{$part_id}{flow};
my $flows_ref = $data{flows}{$flow_id}};
for my $wfref (@$flows_ref) {
#...
}
##
##
Change %{$data{flows }} to just %flows.
Change %{$data{partners}} to just %partners.