docstr: A proxy-call to the dataframe's `.unstack()`.
code: def unstack(self):
      """
      A proxy-call to the dataframe's `.unstack()`.
      """
      return self.dataframe.unstack()
  
imports: from abc import ABC
label_desc: Use image node_id 22 for calling the DataframeAbstract obj's underlying member method code with example usage: obj.unstack() and returns: self