class_docstr: Base class of modifiers.
  
  The `modify` method is called for a function with inputs in a graph topological order
  when you call the GraphConverter(<modifiers>).convert(<root variable>) method.
class_docstr_tok: ["Base","class","of","modifiers",".","The","`","modify","`","method","is","called","for","a","function","with","inputs","in","a","graph","topological","order","when","you","call","the","GraphConverter","(","<","modifiers",">",")",".convert","(","<","root","variable",">",")","method","."]
code: def __init__(self):
      super(FunctionModifier, self).__init__()
      self._map_func_inputs = defaultdict(list)
  
imports: from collections import defaultdict
  import nnabla
  import nnabla.functions
label_desc: Use image node_id 1 to create a new FunctionModifier object from inherited base classes: object with example: obj = FunctionModifier()