PSR-12 formatting of namespaces

PSR-12  says grouped namespaces, when folded, should look like:

use Vendor\Package\SomeNamespace\{
    SubnamespaceOne\ClassA,
    SubnamespaceOne\ClassB,
    SubnamespaceTwo\ClassY,
    ClassZ,
}

Unfortunately my PHPStorm keeps formatting them like:

use Vendor\Package\SomeNamespace\{SubnamespaceOne\ClassA,
    SubnamespaceOne\ClassB,
    SubnamespaceTwo\ClassY,
    ClassZ};

Am I missing the right formatting option or is PHPStorm lagging with implementing PSR-12 (more than a year now)?