docs: def blueprint_loader(app, entry_points=None, modules=None):
      """Run default blueprint loader.
  
      The value of any entry_point or module passed can be either an instance of
      ``flask.Blueprint`` or a callable accepting a ``flask.Flask`` application
      instance as a single argument and returning an instance of
      ``flask.Blueprint``.
  
      :param entry_points: List of entry points providing to Blueprints.
      :param modules: List of Blueprints.
  
      .. versionadded: 1.0.0
      """
      url_prefixes = app.config.get('BLUEPRINTS_URL_PREFIXES', {})
  
      def loader_init_func(bp_or_func):
          bp = bp_or_func(app) if callable(bp_or_func) else bp_or_func
          app.register_blueprint(bp, url_prefix=url_prefixes.get(bp.name))
  
      _loader(app, loader_init_func, entry_points=entry_points, modules=modules)