code: def _flatten(arg):
      return nest.flatten(arg, expand_composites=True)
  
file_path: tensorflow-upstream/tensorflow/python/ops/while_v2_indexed_slices_rewriter.py
imports: from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import func_graph
  from tensorflow.python.framework import indexed_slices
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_conversion
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gen_resource_variable_ops
  from tensorflow.python.util import nest
label_desc: Use image node_id 8 for calling a global function with example usage: _flatten(arg) and returns: nest