Requirement to have more than one manager at a time, for a system role in Identity Manager

How can we have more than one Manager at a time, for a system role in Identity Manager?

We have a requirement where a role's membership can be managed from IT Shop by more than one individua at a time.

I can see only a system role manager can view his/her system role's complete overview in IT Shop and can request its membership for any user or remove existing members directly.

If we can extend this functionality to have multiple managers of a system role, then it will provide great ease to such end users who can be manager of a system role and manage their role membership by themselves.

It will also help in creation of approval workflows to fulfil requirement where approvers want to have same rights as a system role manager in IT Shop.

Our current version is OIM 8.1.5