code: def _tf_tensor_list_stack(list_, opts):
      """Overload of list_stack that stages a Tensor list write."""
      if opts.element_dtype is None:
          raise ValueError(
              "cannot stack a list without knowing its element type;"
              " use set_element_type to annotate it"
          )
      return list_ops.tensor_list_stack(
          list_, element_dtype=opts.element_dtype
      )
  
imports: import collections
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import cond
  from tensorflow.python.ops import list_ops
  from tensorflow.python.ops import tensor_array_ops
label_desc: Use image node_id 14 for calling a global function with example usage: _tf_tensor_list_stack(list_, opts) and returns: list_ops