vlsuite-1.0.x-dev/modules/vlsuite_modal/vlsuite_modal.routing.yml

vlsuite_modal.settings:
  path: '/admin/config/vlsuite/modal'
  defaults:
    _title: 'VLSuite - Modal'
    _form: 'Drupal\vlsuite_modal\Form\VLSuiteModalSettingsForm'
  requirements:
    _permission: 'administer site configuration'