:meth:`NestedWrappedModule.init`, it wraps a second :class:`torch.nn.Sequential`
        container to enable the desired non-uniform ``requires_grad``
        ``use_orig_params=True`` tests. For both ``RECURSIVE`` and ``NO_FSDP``
        init modes, freezes all parameters except the last two to validate
        ``ShardedGradScaler`` support for ranks with no (non-zero sized) local shards in
        FSDP ``use_orig_params=True`` mode.
        z