pm-4.1.x-dev/modules/pm_sub_task/pm_sub_task.links.contextual.yml

entity.pm_sub_task.edit_form:
  route_name: entity.pm_sub_task.edit_form
  group: pm_sub_task
  title: Edit

entity.pm_sub_task.delete_form:
  route_name: entity.pm_sub_task.delete_form
  group: pm_sub_task
  title: Delete
  weight: 10