code: def __call__(self, user_vec, item_vec, item_bias, label):
      outputs = super(PointwiseMSELoss, self).__call__(
          (user_vec, item_vec, item_bias, label)
      )
      return outputs
  
imports: import tensorflow
  from tensorflow.keras.layers import Layer
label_desc: Use image node_id 2 for calling the PointwiseMSELoss obj's underlying member method code with example usage: obj.__call__(user_vec, item_vec, item_bias, label) and returns: outputs