Array of Objects

has 'ip_block'      => (
    is          => 'rw',
    isa         => 'ArrayRef[Obj]',
    default     => sub { [] },
    lazy        => 1,
    handles     => {
        ip_block_add  => 'push',
        ip_block_next => 'shift',
        ip_block_list => 'elements',
        ip_block_size => 'count',
    }
);