class_docstr: Base Class for Tensors in Factorized form
code: def to_unfolded(self, mode):
      return NotImplementedError
  
file_path: tensorly/tensorly/_factorized_tensor.py
imports: from .None import backend
  from .None import tenalg
  from collections.abc import Mapping
  from abc import ABCMeta
label_desc: Use image node_id 3 for calling the FactorizedTensor obj's underlying member method code with example usage: obj.to_unfolded(mode) and returns: NotImplementedError