docstr: A proxy-call to the dataframe's `.count()`.
code: def count(self):
      """
      A proxy-call to the dataframe's `.count()`.
      """
      return self.dataframe.count()
  
imports: from abc import ABC
label_desc: Use image node_id 27 for calling the DataframeAbstract obj's underlying member method code with example usage: obj.count() and returns: self