gitlab-org--gitlab-foss/app/controllers/concerns/toggle_subscription_action.rb

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module ToggleSubscriptionAction
extend ActiveSupport::Concern
def toggle_subscription
return unless current_user
subscribable_resource.toggle_subscription(current_user, subscribable_project)
head :ok
end
private
def subscribable_project
@project || raise(NotImplementedError)
end
def subscribable_resource
raise NotImplementedError
end
end