code: def _to_shard(
      self,
      tensor: torch.Tensor,
      mesh: DeviceMesh,
      mesh_dim: int,
      shard_spec: Placement,
  ) -> torch.Tensor:
      # by default call reduce_shard_tensor of the shard_spec.
      shard_spec = cast(Shard, shard_spec)
      return shard_spec._reduce_shard_tensor(
          tensor, mesh, self.reduce_op, mesh_dim
      )
  
imports: from dataclasses import dataclass
  from typing import Any, cast, List, NamedTuple, Optional, Tuple
  import torch
  import torch.distributed._functional_collectives
  import torch.distributed.distributed_c10d
  from torch.distributed._tensor._collective_utils import mesh_broadcast, mesh_scatter
  from torch.distributed.device_mesh import DeviceMesh
label_desc: Use image node_id 2 for calling the _Partial obj's underlying member method code with example usage: obj._to_shard(tensor, mesh, mesh_dim, shard_spec) and returns: shard_spec