n - Queue like low-level interface for Gearman.
=head1 SYNOPSIS
use Queue::Gearman;
use JSON;
sub add {
my $args = shift;
return $args->{left} + $args->{rigth};
}
=> ['127.0.0.1:6667'],
serialize_method => \&JSON::encode_json,
deserialize_method => \&JSON::decode_json,
);
$queue->can_do('add');
my $task = $queue->enqueu