code: def docker_tag(self, in_name, out_name):
      sp.check_call(
          "docker tag {} {}".format(in_name, out_name), shell=True
      )
  
imports: import os
  import json
  import subprocess
  from pathlib import Path
  import click
  import fiber
  import fiber.core
  from fiber.core import ProcessStatus
label_desc: Use image node_id 6 for calling the DockerImageBuilder obj's underlying member method code with example usage: obj.docker_tag(in_name, out_name) without return types