simplenews-3.0.0-alpha1/config/schema/simplenews.views.schema.yml

views.field.simplenews_user_name:
  type: views_field
  label: 'Username field'
  mapping:
    text:
      type: label
      label: 'Text to display'

views.access.simplenews_subscribers_list_access:
  type: mapping
  label: 'Simplenews: subscribers list'