class_docstr: TransformerConv
code: def forward(self, graph, x, next_num_nodes, degree_norm=None):
      q, k, v, ori_x = x
      k = k + self.edge_type
  
      neigh_feature = self.send_recv(
          graph, q=q, k=k, v=v, degree_norm=degree_norm
      )
      return neigh_feature[:next_num_nodes]
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  import pgl
  import math
  from .None import model_util
label_desc: Use image node_id 5 for calling the TransformerConv obj's underlying member method code with example usage: obj.forward(graph, x, next_num_nodes, degree_norm) and returns: neigh_feature