Azure-acr and docker_layer_cache

Build Environment
1

I would like to take advantage of the docker_layer_cache while building a docker image using azure-acr/build-and-push-image task.

In the example looks something like this:

orbs:
   azure-acr: circleci/azure-acr@x.y.z
   version: 2.1
   workflows:
    build-and-publish-docker-image:
      jobs:
        - azure-acr/build-and-push-image:
          login-server-name: exampleregistry.azurecr.io
          registry-name: exampleregistry
          repo: example-repository
          tag: $CIRCLE_TAG

But deep into the documentation it is stated that you can set a dlc parameter to enable the docker_layer_cache, but there is no example on how to setup it.

The documentation states (CircleCI Developer Hub - circleci/azure-acr Line 201)

executors:
   default:
     description: |
       CircleCI's Ubuntu-based machine executor VM: https://circleci.com/docs/2.0/executor-types/#using-machine
     machine:
       docker_layer_caching: <<parameters.dlc>>
       image: <<parameters.image>>
     parameters:
       dlc:
         default: false
         description: Enable Docker Layer Caching?
         type: boolean
       image:
         default: ubuntu-1604:201903-01
         type: string

I tried different approaches and this is the only one that is valid but still does not enable DLC feature:

executors:
  default:
    machine:
      docker_layer_caching: true

What am I missing or how can I improve to enable docker layer cache?