code: def micro(model="unknown", options=None):
      """Returns a microTVM target.
  
      Parameters
      ----------
      model : str
          Canonically identifies the target device. This is typically a device board level name.
          The allowed values are MICRO_SUPPORTED_MODELS.keys().
      options : str or list of str
          Additional options
      """
      if model not in MICRO_SUPPORTED_MODELS:
          raise ValueError(
              f"Model {model} not supported by tvm.target.micro."
          )
      opts = _merge_opts(
          MICRO_SUPPORTED_MODELS[model] + [f"-model={model}"],
          options,
      )
  
      # NOTE: in the future, the default micro target will be LLVM except when
      # external dependencies are present.
      return Target(" ".join(["c"] + opts))
  
imports: import json
  import re
  import warnings
  from typing import Union
  import tvm._ffi
  from tvm._ffi import register_func
  from tvm._ffi.runtime_ctypes import Device
  from tvm.runtime import Object, convert
  from tvm.runtime.container import String
  from tvm.ir.container import Map, Array
  from .None import _ffi_api
label_desc: Use image node_id 6 for calling a global function with example usage: micro(model, options) and returns: Target