class_docstr: Support for collective operations on a single device (no-op).
  
  .. warning:: This is an :ref:`experimental <versioning:Experimental API>` feature which is still in development.
class_docstr_tok: ["Support","for","collective","operations","on","a","single","device","(","no-op",")",".","..","warning",":",":","This","is","an",":","ref",":","`","experimental","<","versioning",":","Experimental","API",">","`","feature","which","is","still","in","development","."]
code: def barrier(self, *_: Any, **__: Any) -> None:
      pass
  
imports: from typing import Any, List
  from torch import Tensor
  from typing_extensions import override
  from lightning.fabric.plugins.collectives.collective import Collective
  from lightning.fabric.utilities.types import CollectibleGroup
label_desc: Use image node_id 13 for calling the SingleDeviceCollective obj's underlying member method code with example usage: obj.barrier() without return types