=head1 NAME

UniEvent::Resolver::Request - resolver address resolution request

=head1 DESCRIPTION

The reference to the request is always kept in the L<UniEvent::Resolver> object
itself; that means loosing (or C<undef>'ing) request object B<will not> lead
to the request cancellation.

=head1 METHODS

=head2 cancel()

Cancels started address resolution request.
Callback will be called with C<UE::SystemError::operation_canceled> error.

=cut
