class_docstr: Mainly used for maintaining all ParamAttr in a parl.layers.LayerFunc
      
class_docstr_tok: ["Mainly","used","for","maintaining","all","ParamAttr","in","a","parl.layers.LayerFunc"]
docstr: Returns:
      list of all attrs, which is sorted by key
docstr_tok: ["Returns",":","list","of","all","attrs",",","which","is","sorted","by","key"]
code: def sorted(self):
      """
      Returns:
          list of all attrs, which is sorted by key
      """
      return [
          self._attrs_dict[k] for k in sorted(self._attrs_dict.keys())
      ]
  
file_path: PARL/parl/core/fluid/layers/attr_holder.py
imports: import six
  from copy import deepcopy
label_desc: Use image node_id 6 for calling the AttrHolder obj's underlying member method code with example usage: obj.sorted() and returns: unknown