code: def add_to_headers(self, tuple_):
      self.headers.append(tuple_)
  
file_path: lifelines/lifelines/utils/printer.py
imports: from typing import *
  import numpy
  from lifelines import utils
  import pandas
label_desc: Use image node_id 2 for calling the Printer obj's underlying member method code with example usage: obj.add_to_headers(tuple_) without return types