package mylib::json;
  use Exporter 'import';
  our @EXPORT=qw(jsonEncode);
  use JSON::XS;
  sub jsonEncode($) {
	my ($o) = @_;
	my $j = undef;
	eval { $j = JSON::XS->new->encode($o); };
	return $@ ? undef : $j;
  }

##</code><code>##

  package mylib;
  use Exporter 'import';
  use lib 'mylib';
  use mylib::json;
  our @EXPORT = ( @mylib::json::EXPORT );

##</code><code>##

  use strict;
  use warnings;
  use lib '.';
  use mylib;
  print jsonEncode({foo => 'bar'});

##</code><code>##

  use strict;
  use warnings;
  use lib '.';
  use mylib;
  use JSON::WebToken;
  print jsonEncode({foo => 'bar'});

##</code><code>##

Attempt to call undefined import method with arguments ("encode_json" ...) via package "JSON" (Perhaps you forgot to load the package?) at C:/Strawberry/perl/site/lib/JSON/WebToken.pm line 12.