code: def call(self, inputs):
      return self.mlp(inputs)
  
file_path: spektral/spektral/models/general_gnn.py
imports: from tensorflow.keras import Model, Sequential
  from tensorflow.keras.layers import Activation, Add, BatchNormalization, Concatenate, Dense, Dropout, PReLU
  from spektral.layers import GeneralConv
  from spektral.layers.pooling import global_pool
label_desc: Use image node_id 2 for calling the MLP obj's underlying member method code with example usage: obj.call(inputs) and returns: self