class_docstr: The hearbeat service definition.
      
code: def Send(
      request,
      target,
      options=(),
      channel_credentials=None,
      call_credentials=None,
      insecure=False,
      compression=None,
      wait_for_ready=None,
      timeout=None,
      metadata=None,
  ):
      return grpc.experimental.unary_unary(
          request,
          target,
          "/GrpcHeartbeat/Send",
          heartbeat__pb2.Request.SerializeToString,
          heartbeat__pb2.Reply.FromString,
          options,
          channel_credentials,
          insecure,
          call_credentials,
          compression,
          wait_for_ready,
          timeout,
          metadata,
      )
  
file_path: PARL/parl/remote/grpc_heartbeat/heartbeat_pb2_grpc.py
imports: import grpc
  from parl.remote.grpc_heartbeat import heartbeat_pb2
label_desc: Use image node_id 1 for calling the GrpcHeartbeat obj's underlying member method code with example usage: obj.Send(request, target, options, channel_credentials, call_credentials, insecure, compression, wait_for_ready, timeout, metadata) and returns: grpc