class_docstr: a MMPT wrapper class for MMBert style models.
  TODO: move isolated mask to a subclass.
code: def forward(self, caps, cmasks, vfeats, vmasks, **kwargs):
      raise NotImplementedError("Please derive MMFusion module.")
  
imports: import torch
  from torch import nn
  from .None import transformermodel
label_desc: Use image node_id 2 for calling the MMFusion obj's underlying member method code with example usage: obj.forward(caps, cmasks, vfeats, vmasks) without return types