class_docstr: A BertModel with isolated attention mask to separate modality.
class_docstr_tok: ["A","BertModel","with","isolated","attention","mask","to","separate","modality","."]
code: def __init__(self, config):
      super().__init__(config)
      self.videomlp = VideoTokenMLP(config)
      self.bert = MMBertModel(config)
      self.init_weights()
  
imports: import torch
  from torch import nn
  from ..modules import VideoTokenMLP, MMBertEmbeddings
label_desc: Use image node_id 1 to create a new MMBertForJoint object from inherited base classes: BertPreTrainedModel with example: obj = MMBertForJoint(config)