docstr: A proxy-call to the dataframe's `.head()`.
code: def head(self, n):
      """
      A proxy-call to the dataframe's `.head()`.
      """
      return self.dataframe.head(n=n)
  
imports: from abc import ABC
label_desc: Use image node_id 7 for calling the DataframeAbstract obj's underlying member method code with example usage: obj.head(n) and returns: self