Holds the text of the most recent SNMP trap the firewall module itself generated, cached as a readable object rather than only being visible in the trap stream. This matters specifically because SNMP traps are fire-and-forget; a poller that was down when the trap fired would otherwise miss it entirely, but polling fwEvent lets a management station catch up on the last event even after a trap was missed. Example: after a monitoring gap, polling fwEvent and finding the text of a policy-install-completed trap confirms that event fired even though the trap itself never arrived at the NMS.