code: def check_configs(self):
      key = "cell-dim"
      if self.config["cell-dim"] <= 0:
          raise RuntimeError(
              "cell-dim has invalid value {0}.".format(self.config[key])
          )
      if self.config["delay"] == 0:
          raise RuntimeError("delay cannot be zero")
  
imports: from __future__ import print_function
  import math
  import re
  import sys
  from libs.nnet3.xconfig.basic_layers import XconfigLayerBase
label_desc: Use image node_id 4 for calling the XconfigFastLstmLayer obj's underlying member method code with example usage: obj.check_configs() without return types