code: def update_context(cls, base_context, str_or_dict, template_path=None):
          
          if isinstance(str_or_dict, dict):
              base_context.update(str_or_dict)
              base_context['use_tpl'] = True
          else:
              base_context[cls.SIMPLE_TEXT_ID] = str_or_dict
  
          if cls.SIMPLE_TEXT_ID in str_or_dict:
              base_context['use_tpl'] = False
  
          base_context['tpl'] = template_path
docs: Helper method to structure initial message context data.
  
          NOTE: updates `base_context` inplace.
  
          :param dict base_context: context dict to update
          :param dict, str str_or_dict: text representing a message, or a dict to be placed into message context.
          :param str template_path: template path to be used for message rendering