action xtrf_get_custom_field {
  label: "Returns custom field of a given client."
  description: "Returns custom field of a given client."
  provider: xtrf
  method: GET
  path: "/customers/{customerId}/customFields/{customFieldKey}"
  encoding: json
  input: {
    type: "object"
    properties: {
      customFieldKey: {
        type: "string"
      }
      customerId: {
        type: "integer"
        format: "int64"
      }
    }
    required: ["customFieldKey", "customerId"]
    additionalProperties: false
  }
  output: {
    type: "object"
    additionalProperties: true
  }
}