code: def __call__(self, shape: tuple[int, ...]):
      if self == SemaphoreType.DMA:
          dtype = DmaSemaphoreTy()
      elif self == SemaphoreType.BARRIER:
          dtype = BarrierSemaphoreTy()
      else:
          dtype = SemaphoreTy()
      return MemoryRef(shape, dtype, TPUMemorySpace.SEMAPHORE)
  
imports: from __future__ import annotations
  from collections.abc import Sequence
  import dataclasses
  import enum
  import functools
  from typing import Any
  from jax._src import core
  from jax._src import dtypes
  from jax._src import state
  from jax._src import tree_util
  from jax._src import util
  import jax.numpy
  from jax._src.pallas import core
label_desc: Use image node_id 1 for calling the SemaphoreType obj's underlying member method code with example usage: obj.__call__(shape) and returns: MemoryRef