=head1 SYNOPSIS
use Arvados;
- $arv = Arvados->new()->build(apiHost => 'arvados.local');
+ $arv = Arvados->new(apiHost => 'arvados.local');
my $instances = $arv->{'pipeline_instances'}->{'list'}->execute();
print "UUID is ", $instances->{'items'}->[0]->{'uuid'}, "\n";