Limit choice of stages

Is there any way to limit stages to either dev and production

I saw an enum used elsewhere

paths:
/demo:
get:
summary: demonstration for enumeration
description: |
Demonstrates an enumeration
parameters:
- name: day
in: query
description: day of the week
required: true
type: string
enum:
- Monday
- Tuesday
- Wednesday
- Thursday
- Friday
- Saturday
- Sunday