arg_name: param
name: $fieldName
type: string
description: |
  The field for which to return distinct values.
interface: phpmethod
operation: MongoDB\\Collection::distinct
optional: false
position: 1
---
source:
  file: apiargs-common-param.yaml
  ref: $filter
position: 2
optional: true
---
source:
  ref: $options
  file: apiargs-common-param.yaml
operation: MongoDB\\Collection::count
position: 3
...