setting roles in role-strategy-plugin through groovy script

[Maneesh M P]

Can anyone help me to figure out to how to write a groovy script to set roles through groovy script in role based strategy ?

I am able to do it for MatrixAuthorization 

def strategy = new GlobalMatrixAuthorizationStrategy()

strategy.add(Jenkins.ADMINISTER, "test")  

strategy.add(Jenkins.READ, "test")  

strategy.add(Jenkins.RUN_SCRIPTS, "test")

instance.setAuthorizationStrategy(strategy)

instance.save()

but same way if i try for RoleBasedAuthorization it doesn't work

def strategy = new com.michelin.cio.hudson.plugins.rolestrategy.RoleBasedAuthorizationStrategy()

Thanks,

Maneesh