Route detail

array:6 [
  "_controller" => "\Drupal\block\Controller\BlockListController::listing"
  "_title" => "Block layout"
  "theme" => "widgets"
  "_route" => "block.admin_display_theme"
  "_route_object" => Symfony\Component\Routing\Route {#1587
    -path: "/admin/structure/block/list/{theme}"
    -host: ""
    -schemes: []
    -methods: array:2 [
      0 => "GET"
      1 => "POST"
    ]
    -defaults: array:2 [
      "_controller" => "\Drupal\block\Controller\BlockListController::listing"
      "_title" => "Block layout"
    ]
    -requirements: array:2 [
      "_access_theme" => "TRUE"
      "_permission" => "administer blocks"
    ]
    -options: array:4 [
      "compiler_class" => "Drupal\Core\Routing\RouteCompiler"
      "utf8" => true
      "_admin_route" => true
      "_access_checks" => array:2 [
        0 => "access_check.theme"
        1 => "access_check.permission"
      ]
    ]
    -condition: ""
    -compiled: Drupal\Core\Routing\CompiledRoute {#1582
      -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/list"
        ]
      ]
      -staticPrefix: ""
      -regex: "{^/admin/structure/block/list/(?P<theme>[^/]++)$}sDu"
      -pathVariables: array:1 [
        0 => "theme"
      ]
      -hostVariables: []
      -hostRegex: null
      -hostTokens: []
      #fit: 30
      #patternOutline: "/admin/structure/block/list/%"
      #numParts: 5
    }
  }
  "_raw_variables" => Symfony\Component\HttpFoundation\InputBag {#1581
    #parameters: array:1 [
      "theme" => "widgets"
    ]
  }
]