my $pre = $opt{prefix} || '';
my $tiers = $opt{tiers} or die "no tiers defined";
-#my $json = JSON->new()->canonical(); #sort
-# something super weird and broken going on with JSON's auto-loading, just
-# using JSON alone errors out with
-# Can't locate object method "new" via package "null" (perhaps you forgot to
-# load "null"?)
-# yes, "null", not "JSON". so instead, using JSON::XS explicity...
-use JSON::XS;
my $json = JSON::XS->new();
$json->canonical;