code: def te_extern():
      A = te.placeholder((128, 128), name="A")
      B = te.placeholder((128, 128), name="B")
      C = te.extern(
          (128, 128),
          [A, B],
          lambda ins, outs: tvm.tir.call_packed(
              "tvm.contrib.cblas.matmul", ins[0], ins[1], outs[0], 0, 0
          ),
          name="C",
      )
      return [A, B, C]
  
imports: import numpy
  import tvm
  import tvm.testing
  from tvm import te, tir, topi, relay
  from tvm.script import tir
  import pytest
label_desc: Use image node_id 18 for calling a global function with example usage: te_extern() and returns: list