docstr: Returns the next trading day (datetime/date instance) after ``day``
  (datetime/date instance)
docstr_tok: ["Returns","the","next","trading","day","(","datetime\/date","instance",")","after","``","day","``","(","datetime\/date","instance",")"]
code: def nextday(self, day):
      """
      Returns the next trading day (datetime/date instance) after ``day``
      (datetime/date instance)
      """
      return self._nextday(day)[0]
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from datetime import datetime, timedelta, time
  from .metabase import MetaParams
  from backtrader.utils.py3 import string_types, with_metaclass
  from backtrader.utils import UTC
label_desc: Use image node_id 3 for calling the TradingCalendarBase obj's underlying member method code with example usage: obj.nextday(day) and returns: self