code: def matmul_plain_ix2(self):
      getattr(self.ea, "matmul_plaintext_ix2_f64")(self.c)
  
imports: import pytest
  import operator
  import os
  import numpy
  import phe
label_desc: Use image node_id 10 for calling the BenchSuite obj's underlying member method code with example usage: obj.matmul_plain_ix2() without return types