code: def call(self, features):
      h = features
      for layer in self.layers:
          h = layer(h)
      return h
  
file_path: dgl/examples/tensorflow/gcn/gcn_builtin.py
imports: import argparse
  import math
  import time
  import dgl
  import dgl.function
  import networkx
  import numpy
  import tensorflow
  from dgl.data import CiteseerGraphDataset, CoraGraphDataset, PubmedGraphDataset, register_data_args
  from tensorflow.keras import layers
label_desc: Use image node_id 2 for calling the GCN obj's underlying member method code with example usage: obj.call(features) and returns: h