docstr: A proxy-call to the dataframe's `.sample()`.
code: def sample(self, n):
      """
      A proxy-call to the dataframe's `.sample()`.
      """
      return self.dataframe.sample(n=n)
  
imports: from abc import ABC
label_desc: Use image node_id 9 for calling the DataframeAbstract obj's underlying member method code with example usage: obj.sample(n) and returns: self