code: def gru_unit(**kwargs):
      """
      We cannot pass param_attr or bias_attr to paddle.fluid.layers.gru_unit yet.
      """
      raise NotImplementedError()
  
imports: import inspect
  import paddle.fluid.layers
  import paddle.fluid.unique_name
  import paddle.fluid
  import six
  from copy import deepcopy
  from paddle.fluid.executor import _fetch_var
  from paddle.fluid.framework import Variable
  from paddle.fluid.layers import *
  from paddle.fluid.param_attr import ParamAttr
  from parl.core.fluid.layers.attr_holder import AttrHolder
  from parl.utils import get_fluid_version
label_desc: Use image node_id 8 for calling a global function with example usage: gru_unit() without return types