class_docstr: A wrapper class for the PARAFAC2 decomposition.
code: def to_vec(self):
      return parafac2_to_vec(self)
  
imports: from .None import backend
  from .base import unfold, tensor_to_vec
  from ._factorized_tensor import FactorizedTensor
label_desc: Use image node_id 8 for calling the Parafac2Tensor obj's underlying member method code with example usage: obj.to_vec() and returns: parafac2_to_vec