code: def _checkfill(self, line):
      diff2last = self._lastlen - len(line)
      if diff2last > 0:
          self.write(" " * diff2last)
  
imports: import sys, os, unicodedata
  import py
  from py.builtin import text, bytes
label_desc: Use image node_id 13 for calling the TerminalWriter obj's underlying member method code with example usage: obj._checkfill(line) without return types