use feature "switch";
use Time::HiRes qw( time usleep );
-no if $] >= 5.017011, warnings => 'experimental::smartmatch';
use if (defined $ENV{'QUERY_STRING'}), CGI::Carp => qw(fatalsToBrowser);
use if (!defined $ENV{'QUERY_STRING'}), warnings;
use if (!defined $ENV{'QUERY_STRING'}), Pod::Usage;
use if (!defined $ENV{'QUERY_STRING'}), Data::Dumper;
use if (!defined $ENV{'QUERY_STRING'}), Data::TreeDumper;
use if (!defined $ENV{'QUERY_STRING'}), Getopt::Long;
+no warnings 'experimental::smartmatch';
# use Data::TreeDumper;
use Data::Dumper;