code: def get_feature_config(self):
      fields = []
      names = []
  
      template_if = "If(IsNull({1}), {0}, {1})"
      template_paused = "Select(Gt($paused_num, 1.001), {0})"
      template_fillnan = "FFillNan({0})"
      fields += [
          template_fillnan.format(template_paused.format("$close")),
      ]
      names += ["$close0"]
  
      fields += [
          template_paused.format(
              template_if.format(
                  template_fillnan.format("$close"),
                  "$vwap",
              )
          )
      ]
      names += ["$vwap0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$volume")
          )
      ]
      names += ["$volume0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$bid")
          )
      ]
      names += ["$bid0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$bidV")
          )
      ]
      names += ["$bidV0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$ask")
          )
      ]
      names += ["$ask0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$askV")
          )
      ]
      names += ["$askV0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("($bid + $ask) / 2")
          )
      ]
      names += ["$median0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$factor")
          )
      ]
      names += ["$factor0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$downlimitmarket")
          )
      ]
      names += ["$downlimitmarket0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$uplimitmarket")
          )
      ]
      names += ["$uplimitmarket0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$highmarket")
          )
      ]
      names += ["$highmarket0"]
  
      fields += [
          template_paused.format(
              "If(IsNull({0}), 0, {0})".format("$lowmarket")
          )
      ]
      names += ["$lowmarket0"]
  
      return fields, names
  
imports: from qlib.data.dataset.handler import DataHandler, DataHandlerLP
  from .handler import check_transform_proc
label_desc: Use image node_id 2 for calling the HighFreqBacktestOrderHandler obj's underlying member method code with example usage: obj.get_feature_config() and returns: fields,  names