code: def forward(self):
      op = core.CreateOperator(
          "MatMul",
          [self.input_one, self.input_two],
          self.output,
          **self.args,
      )
      return op
  
imports: import benchmark_caffe2
  from benchmark_caffe2 import Caffe2BenchmarkBase
  from caffe2.python import core
  import operator_benchmark
label_desc: Use image node_id 2 for calling the MatMulBenchmark obj's underlying member method code with example usage: obj.forward() and returns: op