title: Serverless.yml config to deploy one lambda function to a service without removing the others
body: <p>I have the following serverless.yml:</p>
  <pre><code>service: my-service
  
  provider:
    name: aws
    runtime: python3.7
  
  package:
    individually: true
  
  functions:
    main:
      handler: src/main.lambda_handler
      name: my-new-func
      package:
        individually: true
  </code></pre>
  <p>But deploying this will purge all other functions in <code>my-service</code> apparently, even though I use the <code>individually: true</code> option.</p>
  <p>Is it possible to deploy one lambda function without change to the other functions?</p>