docstr: A proxy-call to the dataframe's `.concat()`.
code: def concat(self, others):
      """
      A proxy-call to the dataframe's `.concat()`.
      """
      return self.dataframe.concat(others=others)
  
imports: from abc import ABC
label_desc: Use image node_id 26 for calling the DataframeAbstract obj's underlying member method code with example usage: obj.concat(others) and returns: self