code: def to_x(self, n_id):
      x = self._encoder(n_id)
      return x
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow
  import tf_euler
  from tf_euler.python.mp_utils.base import UnsuperviseModel
  from tf_euler.python.euler_ops import mp_ops
  from tf_euler.python.mp_utils.base_gnn import BaseGNNNet
  from tf_euler.python.dataflow import RelationDataFlow
  from tf_euler.python.convolution import RelationConv
label_desc: Use image node_id 2 for calling the GNN obj's underlying member method code with example usage: obj.to_x(n_id) and returns: x