crm_core-8.x-3.x-dev/modules/crm_core_activity/tests/modules/crm_core_activity_plugin_test/config/schema/crm_core_activity_plugin_test.schema.yml

crm_core_activity.configuration.with_config:
  type: mapping
  label: 'Test plugin config'
  mapping:
    configuration_variable:
      type: string
      label: 'Dummy config'