code: def all_params_names(self):
      params_names = []
      for attr in self.attr_holder.tolist():
          if attr:
              params_names.append(attr.name)
      return params_names
  
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 5 for calling the LayerFunc obj's underlying member method code with example usage: obj.all_params_names() and returns: params_names