public Optional<Output<Boolean>> optional() {
        return Optional.ofNullable(this.optional);
    }
@return If true, don&#39;t block pod startup if the referenced ClusterTrustBundle(s) aren&#39;t available.  If using name, then the named ClusterTrustBundle is allowed not to exist.  If using signerName, then the combination of signerName and labelSelector is allowed to match zero ClusterTrustBundles.
sdk/java/src/main/java/com/pulumi/kubernetes/core/v1/inputs/ClusterTrustBundleProjectionArgs.java