Alphabetical and '@key'

Describe the bug

I may be doing it wrong, but the alphabetical function doesn’t appear to work with '@key'. Here’s the rule I’m trying to create:

  response-order:
    message: Responses should be in alphabetical order
    recommended: true
    given: $.paths.*.*
    then:
      field: responses
      function: alphabetical
      functionOptions:
        keyedBy: '@key'

I’ve also tried this form:

  response-order:
    message: Responses should be in alphabetical order
    recommended: true
    given: $.paths.*.*.responses
    then:
      field: '@key'
      function: alphabetical

To Reproduce

Given this OpenAPI document

openapi: 3.0.2
info:
  title: Test Spec
  version: 0.0.0
paths:
  /foo:
    get:
      operationId: get-foo
      responses:
        '400':
          description: ''
        '200':
          description: ''

Run this CLI command

spectral lint test-spec.yaml -r my-rules.yaml

Expected behavior

The lint output should contain the following:

 9:17  warning  response-order    Responses should be in alphabetical order

Environment

• Library version: 4.2.0
• OS: Windows 10

[P0lip]

@dillonredding soon! hopefully next week or in 2 weeks 😃 Def before the end of year.

[P0lip]

@dillonredding Just wanted to give you heads up that this particular issue is going to be resolved in the next release.