code: def _gfile_join(a, b):
      # The join API is different between tensorboard's TF stub and TF:
      # https://github.com/tensorflow/tensorboard/issues/6080
      # We need to try both because `tf` may point to either the stub or the real TF.
      if _HAS_GFILE_JOIN:
          return tf.io.gfile.join(a, b)
      else:
          fs = tf.io.gfile.get_filesystem(a)
          return fs.join(a, b)
  
file_path: pytorch/torch/utils/tensorboard/_embedding.py
imports: import math
  import numpy
  from ._convert_np import make_np
  from ._utils import make_grid
  from tensorboard.compat import tf
  from tensorboard.plugins.projector.projector_config_pb2 import EmbeddingInfo
label_desc: Use image node_id 1 for calling a global function with example usage: _gfile_join(a, b) and returns: tf, fs