BEGIN {
	if ( eval { require Data::Dump; 1 } )
		{ Data::Dump->import('dd'); }
	else {
		require Data::Dumper;
		*dd = sub { print Data::Dumper->new(\@_)->Purity(1)
			->Useqq(1)->Quotekeys(0)->Sortkeys(1)->Dump };
	}
}