code: def init_blueprint(self, blueprint, path='templates.yaml'):
          
          if self._route is not None:
              raise TypeError("route cannot be set when using blueprints!")
  
          # we need to tuck our reference to this Ask instance into the blueprint object and find it later!
          blueprint.ask = self
  
          # BlueprintSetupState.add_url_rule gets called underneath the covers and
          # concats the rule string, so we should set to an empty string to allow
          # Blueprint('blueprint_api', __name__, url_prefix="/ask") to result in
          # exposing the rule at "/ask" and not "/ask/".
          blueprint.add_url_rule("", view_func=self._flask_view_func, methods=['POST'])
          blueprint.jinja_loader = ChoiceLoader([YamlLoader(blueprint, path)])
docs: Initialize a Flask Blueprint, similar to init_app, but without the access
          to the application config.
  
          Keyword Arguments:
              blueprint {Flask Blueprint} -- Flask Blueprint instance to initialize (Default: {None})
              path {str} -- path to templates yaml file, relative to Blueprint (Default: {'templates.yaml'})