name: chart_country_code
description: 'Filter charts by country codes'
in: query
required: false
schema:
  type: array
  items:
    $ref: '../schemas/properties/country_code.yaml'
examples:
  worldwide:
    value: 'worldwide'
  us:
    value: 'us'
  de:
    value: 'de'
  gb:
    value: 'gb'
  'us, de, gb':
    value: ['us', 'de', 'gb']