Disable COS Instance Deletion if it has any Buckets/Objects

Disable COS Instance Deletion if it has any Buckets/Objects.

We can delete the COS Instances even if it has child resources like Buckets and Objects in it. This is really a threat to the IBM Cloud COS. If a user gains access and simply click on Delete COS Instance and it deletes the instance without warning. It will take all the data inside it and that can not be reversed.