<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=323399) </details> <!--IssueSummary end--> The [execute](https://gitlab.com/gitlab-org/gitlab/-/blob/v13.9.1-ee/app/models/project_services/chat_notification_service.rb#L72-103) method of the ChatNotificationService has a very high complexity. One approach to reduce it is to build a wrapper class for the `data` payload that could handle all the `data[:something]` calls.