public Optional<Boolean> readOnlyRootFilesystem() {
        return Optional.ofNullable(this.readOnlyRootFilesystem);
    }
@return readOnlyRootFilesystem when set to true will force containers to run with a read only root file system.  If the container specifically requests to run with a non-read only root file system the PSP should deny the pod. If set to false the container may run with a read only root file system if it wishes but it will not be forced to.
sdk/java/src/main/java/com/pulumi/kubernetes/extensions/v1beta1/outputs/PodSecurityPolicySpec.java