class_docstr: used for short urls
code: def index(self, url_id: int) -> FlaskResponse:
      url = db.session.query(models.Url).get(url_id)
      if url and url.url:
          explore_url = self._validate_explore_url(url.url)
          if explore_url:
              if explore_url.startswith("//explore/?"):
                  explore_url = f"//explore/?r={url_id}"
              return redirect(explore_url[1:])
  
          dashboard_url = self._validate_dashboard_url(url.url)
          if dashboard_url:
              return redirect(dashboard_url[1:])
  
          return redirect("/")
  
      flash("URL to nowhere...", "danger")
      return redirect("/")
  
file_path: superset/superset/views/redirects.py
imports: import logging
  from typing import Optional
  from flask import flash
  from flask_appbuilder import expose
  from werkzeug.utils import redirect
  from superset import db, event_logger
  from superset.models import core
  from superset.superset_typing import FlaskResponse
  from superset.views.base import BaseSupersetView
label_desc: Use image node_id 3 for calling the R obj's underlying member method code with example usage: obj.index(url_id) and returns: redirect, redirect, redirect, redirect