How to use the MegatronStrategy in Pytorch Lightning with custom model?

[Crazy-LittleBoy]

Is there a example?

[Crazy-LittleBoy]

If I directly use MegatronStrategy for my custom model in PyTorch Lightning, I will encounter the following error:
ValueError: You selected an invalid strategy name: strategy=<nemo.lightning.pytorch.strategies.megatron_strategy.MegatronStrategy object at 0x73a46c0dcdd0>. It must be either a string or an instance of lightning.pytorch.strategies.Strategy. Example choices: auto, ddp, ddp_spawn, deepspeed, ... Find a complete list of options in our documentation at https://lightning.ai