farm-2.x-dev/modules/core/ui/location/farm_ui_location.routing.yml

farm.locations:
  path: '/locations'
  defaults:
    _title_callback: '\Drupal\farm_ui_location\Form\LocationHierarchyForm::getTitle'
    _form: '\Drupal\farm_ui_location\Form\LocationHierarchyForm'
  requirements:
    _permission: 'access locations overview'

farm.asset.locations:
  path: '/asset/{asset}/locations'
  defaults:
    _title_callback: '\Drupal\farm_ui_location\Form\LocationHierarchyForm::getTitle'
    _form: '\Drupal\farm_ui_location\Form\LocationHierarchyForm'
  requirements:
    _entity_access: 'asset.edit'
    _custom_access: '\Drupal\farm_ui_location\Form\LocationHierarchyForm::access'
    _module_dependencies: 'asset'
    asset: \d+
  options:
    parameters:
      asset:
        type: entity:asset