code: def get_feature_config(self):
      fields = []
      names = []
  
      if "$close" in self.columns:
          template_paused = f"Cut({{0}}, {self.day_length * 2}, None)"
          template_fillnan = "FFillNan({0})"
          template_if = "If(IsNull({1}), {0}, {1})"
          fields += [
              template_paused.format(template_fillnan.format("$close")),
          ]
          names += ["$close0"]
  
      if "$vwap" in self.columns:
          fields += [
              template_paused.format(
                  template_if.format(
                      template_fillnan.format("$close"), "$vwap"
                  )
              ),
          ]
          names += ["$vwap0"]
  
      if "$volume" in self.columns:
          fields += [
              template_paused.format(
                  "If(IsNull({0}), 0, {0})".format("$volume")
              )
          ]
          names += ["$volume0"]
  
      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 HighFreqGeneralBacktestHandler obj's underlying member method code with example usage: obj.get_feature_config() and returns: fields,  names