Route detail

Symfony\Component\Routing\Route {#1574
  -path: "/admin/structure/block/demo/{theme}"
  -host: ""
  -schemes: []
  -methods: array:2 [
    0 => "GET"
    1 => "POST"
  ]
  -defaults: array:2 [
    "_controller" => "\Drupal\block\Controller\BlockController::demo"
    "_title_callback" => "theme_handler:getName"
  ]
  -requirements: array:2 [
    "_access_theme" => "TRUE"
    "_permission" => "administer blocks"
  ]
  -options: array:4 [
    "compiler_class" => "Drupal\Core\Routing\RouteCompiler"
    "_admin_route" => false
    "utf8" => true
    "_access_checks" => array:2 [
      0 => "access_check.theme"
      1 => "access_check.permission"
    ]
  ]
  -condition: ""
  -compiled: Drupal\Core\Routing\CompiledRoute {#1571
    -variables: array:1 [
      0 => "theme"
    ]
    -tokens: array:2 [
      0 => array:5 [
        0 => "variable"
        1 => "/"
        2 => "[^/]++"
        3 => "theme"
        4 => true
      ]
      1 => array:2 [
        0 => "text"
        1 => "/admin/structure/block/demo"
      ]
    ]
    -staticPrefix: ""
    -regex: "{^/admin/structure/block/demo/(?P<theme>[^/]++)$}sDu"
    -pathVariables: array:1 [
      0 => "theme"
    ]
    -hostVariables: []
    -hostRegex: null
    -hostTokens: []
    #fit: 30
    #patternOutline: "/admin/structure/block/demo/%"
    #numParts: 5
  }
}