entity_activity-8.x-1.0-beta13/modules/entity_activity_mass_subscribe/entity_activity_mass_subscribe.libraries.yml

mass_subscribe:
  version: VERSION
  css:
    theme:
      css/mass_subscribe.css: {}
  js:
    js/mass_subscribe.js: {}
  dependencies:
    - core/jquery
    - core/jquery.once
    - core/drupal