code: func (e *Environment) InstallHandlersWithMiddleware(r *router.Router, base router.MiddlewareChain) {
  	warmup.InstallHandlers(r, base)
  
  	if e.ExtraHandlers != nil {
  		e.ExtraHandlers(r, base)
  	}
  }
docs: // InstallHandlersWithMiddleware installs handlers for an Environment's
  // framework routes.
  //
  // In addition to Environment-specific handlers, InstallHandlersWithMiddleware
  // installs:
  //  * Warmup Handler (warmup)