code: def _get_birnn_param(f):
      if f.root_function.op_name != "Splice":
          raise NotImplementedError()
      # assuming forward/backward cell first/second input to Splice
      fw = f.root_function.inputs[0].owner
      bw = f.root_function.inputs[1].owner
      return cstk.RnnArgs(
          fw_W=find_func_param(fw, name="W"),
          fw_H=find_func_param(fw, name="H"),
          fw_b=find_func_param(fw, name="b"),
          bw_W=find_func_param(bw, name="W"),
          bw_H=find_func_param(bw, name="H"),
          bw_b=find_func_param(bw, name="b"),
      )
  
imports: import cntk
  import numpy
  from cntk.contrib import crosstalk
label_desc: Use image node_id 12 for calling a global function with example usage: _get_birnn_param(f) and returns: cstk