Pipeline trigger on close pull request

I want to trigger my pipeline when a Pull request (PR) is closed, maybe something like following:

trigger:
  event:
    - push
    - pull_request
    - closed

is this possible because this is very crucial and important for our development environment. we want to close and trigger a cleanup code when a PR gets closed.
any help would be appreciated. thanks

Hello Faizan,

Drone does not support pull request closed events. We may add support for additional event types in the future, however, it is not currently prioritised.

Regards,
Harness Support