docstr: A proxy-call to the dataframe's `.join()`.
code: def join(self, other):
      """
      A proxy-call to the dataframe's `.join()`.
      """
      return self.dataframe.join(other=other)
  
imports: from abc import ABC
label_desc: Use image node_id 24 for calling the DataframeAbstract obj's underlying member method code with example usage: obj.join(other) and returns: self