code: def process_request(self, server_state):
      assert self.hello_str == STR
      assert self.integer == INTEGER
      new_tensor = self.func(self.tensor)
      res = HelloResponse(self.hello_str, self.integer, new_tensor)
      return res
  
file_path: dgl/tests/dist/python/rpc_basic.py
imports: import os
  import backend
  import dgl
  from numpy.testing import assert_array_equal
label_desc: Use image node_id 4 for calling the HelloRequest obj's underlying member method code with example usage: obj.process_request(server_state) and returns: res