package MyPackage;

use strict;
use warnings;

use Exporter qw(import);
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(
    func_one
    func_two
);
our @EXPORT_PRIVATE = qw(
    _private_one
    _private_two
);
our %EXPORT_TAGS = (
    all     => \@EXPORT_OK,
    private => \@EXPORT_PRIVATE,
)

##</code><code>##

use warnings;
use strict;

use MyPackage qw(:all :private);

...

##</code><code>##

"_private_one" is not exported by the MyModule module
"_private_two" is not exported by the MyModule module
Can't continue after import errors at ... line ....
BEGIN failed--compilation aborted at ... line ...