service theme.negotiator.domain_theme_switch in Domain Theme Switch 8

class: Drupal\domain_theme_switch\Theme\ThemeSwitchNegotiator
arguments:
  - '@router.admin_context'
  - '@current_user'
  - '@domain.negotiator'
  - '@config.factory'
tags:
  - { name: theme_negotiator, priority: 10 }