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

sub _add_private {
    push @EXPORT_OK, @EXPORT_PRIVATE;
    return \@EXPORT_OK;