Many methods in RoleStrategy use String APIs. It complicates performance of data fetching, especially for internal API calls.

• https://github.com/jenkinsci/role-strategy-plugin/blob/role-strategy-2.9.0/src/main/java/com/michelin/cio/hudson/plugins/rolestrategy/RoleBasedAuthorizationStrategy.java#L182

• https://github.com/jenkinsci/role-strategy-plugin/blob/role-strategy-2.9.0/src/main/java/com/michelin/cio/hudson/plugins/rolestrategy/RoleBasedAuthorizationStrategy.java#L209

It would be nice to introduce a new set of methods which would be using the RoleType enum instead.