code: def metrics_cmd(self, cmd):
      cmd_options = []
      for key_value in cmd:
          for k, v in key_value.items():
              if k == "cmd":
                  cmd_options.append(v)
              elif k == "--namespace":
                  cmd_options.append(k)
                  cmd_options.append("".join(v))
              else:
                  cmd_options.append(k)
                  cmd_options.append(v)
              break
  
      self.bm_config["metrics_cmd"] = " ".join(cmd_options)
  
imports: import argparse
  import datetime
  import os
  import shutil
  from subprocess import Popen
  import ruamel.yaml
  from utils import gen_md_report, gen_metrics_json, gen_model_config_json
label_desc: Use image node_id 5 for calling the BenchmarkConfig obj's underlying member method code with example usage: obj.metrics_cmd(cmd) without return types