    # File lib/fog/virtual_box/models/compute/nat_redirect.rb, line 51
            def save
              requires :nat_engine, :name, :protocol, :host_ip, :host_port, :guest_ip, :guest_port
              with_session do |session|
                raw_network_adapter = session.machine.get_network_adapter(nat_engine.network_adapter.slot)
                raw_nat_engine = raw_network_adapter.nat_driver
                raw_nat_engine.add_redirect(name, protocol, host_ip, host_port, guest_ip, guest_port)
                session.machine.save_settings
              end
              true
            end