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=head1 NAME
Bio::DB::GFF::Aggregator::none -- No aggregation
=head1 SYNOPSIS
  use Bio::DB::GFF;
  # Open the sequence database
  my $db      = Bio::DB::GFF->new( -adaptor => 'dbi:mysql',
                                   -dsn     => 'dbi:mysql:elegans42',
                                   -aggregator => 'none'
                                 );
=head1 DESCRIPTION
Bio::DB::GFF::Aggregator::none can be used to indicate that you do not
want any aggregation performed.  It is equivalent to providing undef
to the B<-aggregator> argument.  It overrides disaggregate() and
aggregate() so that they do exactly nothing.
=cut
package Bio::DB::GFF::Aggregator::none;
use strict;
use base qw(Bio::DB::GFF::Aggregator);
sub disaggregate {
  my $self  = shift;
  my $types = shift;
  # no change
}
sub aggregate {
  my $self = shift;
  my $features = shift;
  return;  # no change
}
1;