code: def _shape_to_single_shard(
      self, shape: Tuple[sint, ...], lb: LazyBuffer
  ) -> Tuple[sint, ...]:
      return tuple(
          lb.shape[self.axis] if a == self.axis else s
          for a, s in enumerate(shape)
      )
  
imports: from __future__ import annotations
  from typing import Optional, Union, Any, Tuple, List
  import functools
  from tinygrad.helpers import all_same, dedup, round_up, DEBUG
  from tinygrad.dtype import DType
  from tinygrad.ops import BinaryOps, LoadOps, UnaryOps, TernaryOps, ReduceOps
  from tinygrad.lazy import LazyBuffer, create_schedule
  from tinygrad.shape.shapetracker import ShapeTracker, sint
label_desc: Use image node_id 12 for calling the MultiLazyBuffer obj's underlying member method code with example usage: obj._shape_to_single_shard(shape, lb) and returns: tuple