Whether or not safety lock is currently enabled.

Safety lock is a feature that allows the UI to disable or change certain functionality depending on whether or not it's safe for the driver to do so. E.g., while driving it is commonly considered unsafe for the driver to be typing, and so a frontend that allows text input may disable its input field when isSafetyLockEnabled is set to true.

As safety lock is only intended to be relevant for the driver, IVI instances for passenger displays typically do not have a SafetyLockService registered. If SafetyLockService is not registered for the Panel's IVI instance, this will always be false.