Is it possible to update API gateway routes ?

I would like to use chalice to setup API gateway. I start with a simple route

```@app.route('/')
def index():
return {'hello': 'world'}

@app.route('/customer1')
def index():
return {'who': 'customer1'}

@app.route('/customer2')
def index():
return {'who': 'customer2'}

```

Now customer3 arrives few days later. Is there a way to update without shutting down and restarting all the resources. Thanks for pointers as it'd help me decide if chalice is the right way to go. I just tried custom domain and chalice was such a breeze!! Fantastic productive framework!

The issue names Chalice route decorators, API Gateway, and custom domains but mentions no repository files or tests. Start by tracing how Chalice deploys route definitions to API Gateway; done means establishing whether a new route can be added without restarting existing resources and identifying the required behavior or documentation.

Written by the indexing model from the issue text.