code: def _add_host(arg_group):
      arg_group.add_argument(
          "--host",
          "--host-in",
          type=str,
          default=__default_host__,
          help=f"The host address of the runtime, by default it is {__default_host__}.",
      )
  
file_path: jina/jina/parsers/orchestrate/runtimes/remote.py
imports: from jina.constants import __default_host__
  from jina.parsers.helper import CastHostAction, KVAppendAction, add_arg_group
  from jina.parsers.orchestrate.runtimes.grpc_channel import mixin_grpc_channel_options_parser
  from jina.parsers.orchestrate.runtimes.runtime import mixin_base_runtime_parser
label_desc: Use image node_id 5 for calling a global function with example usage: _add_host(arg_group) without return types