Use event parameter
This is part of the refactoring happening in bug 30975
Test plan:
1. Verify that the plugin continues to work as before
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
