docstr: A proxy-call to the dataframe's `.drop_duplicates()`.
code: def drop_duplicates(self, subset):
      """
      A proxy-call to the dataframe's `.drop_duplicates()`.
      """
      return self.dataframe.drop_duplicates(subset=subset)
  
imports: from abc import ABC
label_desc: Use image node_id 16 for calling the DataframeAbstract obj's underlying member method code with example usage: obj.drop_duplicates(subset) and returns: self