code: def instantiate(
      self,
      mode: str = REPLICA,
  ) -> tuple[
      numpy.ndarray,
      array.DistributedArray,
      numpy.ndarray,
      array.DistributedArray,
  ]:
      return self.a.instantiate(mode) + self.b.instantiate(mode)
  
imports: import dataclasses
  import math
  import pytest
  import numpy
  import cupy
  from cupy import testing
  from cupyx.distributed.array import _linalg
  from cupyx.distributed import array
  from cupyx.distributed.array import REPLICA, SUM
label_desc: Use image node_id 1 for calling the MatMulConfig obj's underlying member method code with example usage: obj.instantiate(mode) and returns: unknown