code: def _is_empty_tuple(x):
      """Check if x is either empty or a tuple of (tuples of) empty things."""
      if not isinstance(x, (list, tuple)):
          return False
      for y in x:
          if not _is_empty_tuple(y):
              return False
      return True
  
imports: from concurrent import futures
  import functools
  import os
  import time
  from absl import logging
  import jax
  import numpy
  import psutil
  from trax import fastmath
  from trax import layers
  from trax.fastmath import numpy
  from trax.layers import base
  from trax.layers import combinators
label_desc: Use image node_id 6 for calling a global function with example usage: _is_empty_tuple(x) and returns: True, False, False