As you know, GFF3 files can contain FASTA sequences after the feature table.

How do I extract a specific FASTA sequence given it's ID?

my $gffio = Bio::Tools::GFF->new(
    -file =>
        "/path/to/file.gff",
    -gff_version => 3
);

print Dumper $gffio->get_seqs();

but it's seems null, although the GFF3 has sequences and is also valid. I am abke to parse the features themselves (using $gffio->next_feature()), but not the sequences ($gffio->get_seqs());