Service file.mime_type.guesser.extension detail

Computed Definition =>

array:3 [
  "class" => "Drupal\Core\ProxyClass\File\MimeType\ExtensionMimeTypeGuesser"
  "arguments" => {#1572
    +"type": "collection"
    +"value": array:2 [
      0 => {#1569
        +"type": "service"
        +"id": "service_container"
        +"invalidBehavior": 1
      }
      1 => "drupal.proxy_original_service.file.mime_type.guesser.extension"
    ]
  }
  "arguments_count" => 2
]

Instance =>

Drupal\Core\ProxyClass\File\MimeType\ExtensionMimeTypeGuesser {#1567
  #drupalProxyOriginalServiceId: "drupal.proxy_original_service.file.mime_type.guesser.extension"
  #service: null
  #container: Drupal\Core\DependencyInjection\Container {#40 …7}
  #_serviceIds: []
  #_entityStorages: []
}