code: def get_conv(self, conv_class, dim):
      conv = conv_class(self.fea_dim, dim, None, self.relation_num)
      self.fea_dim = dim
      return conv
  
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 4 for calling the GNN obj's underlying member method code with example usage: obj.get_conv(conv_class, dim) and returns: conv