code: def _is_gpu_available():
      return bool(tf.config.list_logical_devices("GPU"))
  
file_path: keras/keras/backend/tensorflow/rnn.py
imports: import tensorflow
  import tree
  from keras.utils.nest import pack_sequence_as
label_desc: Use image node_id 9 for calling a global function with example usage: _is_gpu_available() and returns: bool