Set 'Enable Slave → Master Access Control' from script console

Question

How can I toggle on Jenkins' Enable Slave -> Master Access Control (listed under Configure System), control from a Groovy script run using the script console?

I suspect the answer will involve the MasterKillSwitchConfiguration class.

Answer 1

Answer is:

Jenkins.instance.injector.getInstance(AdminWhitelistRule.class)
    .setMasterKillSwitch(false);
Jenkins.instance.save()