class_docstr: A pen that does nothing.
code: def addVarComponent(self, glyphName, transformation, location):
      pass
  
imports: from typing import Tuple, Dict
  from fontTools.misc.loggingTools import LogMixin
  from fontTools.misc.transform import DecomposedTransform
label_desc: Use image node_id 8 for calling the NullPen obj's underlying member method code with example usage: obj.addVarComponent(glyphName, transformation, location) without return types