Popsu-coloque/web/core/modules/system/tests/themes/test_ckeditor_stylesheets_protocol_relative/test_ckeditor_stylesheets_protocol_relative.info.yml

name: Test protocol-relative CKEditor stylesheets
type: theme
description: 'A theme that uses a protocol-relative CKEditor stylesheet.'
version: VERSION
base theme: false
core: 8.x

ckeditor_stylesheets:
  - //fonts.googleapis.com/css?family=Open+Sans