code: def tf2():
      """Provide the root module of a TF-2.0 API for use within TensorBoard.
  
      Returns:
        The root module of a TF-2.0 API, if available.
  
      Raises:
        ImportError: if a TF-2.0 API is not available.
      """
      # Resolve the lazy `tf` compat API from earlier in this file and try to find
      # tf.compat.v2. Don't check tf.__version__ since this is not always reliable
      # if TF was built with tf_api_version!=2.
      if hasattr(tf, "compat") and hasattr(tf.compat, "v2"):
          return tf.compat.v2
      raise ImportError("cannot import tensorflow 2.0 API")
  
label_desc: Use image node_id 2 for calling a global function with example usage: tf2() and returns: tf