public Optional<Output<String>> group() {
        return Optional.ofNullable(this.group);
    }
@return group is the API group of the defined custom resource. The custom resources are served under `/apis/&lt;group&gt;/...`. Must match the name of the CustomResourceDefinition (in the form `&lt;names.plural&gt;.&lt;group&gt;`).
sdk/java/src/main/java/com/pulumi/kubernetes/apiextensions/v1/inputs/CustomResourceDefinitionSpecPatchArgs.java