Service cache.backend.chainedfast detail

Computed Definition =>

array:4 [
  "class" => "Drupal\Core\Cache\ChainedFastBackendFactory"
  "arguments" => {#1571
    +"type": "collection"
    +"value": array:1 [
      0 => {#1569
        +"type": "service"
        +"id": "settings"
        +"invalidBehavior": 1
      }
    ]
  }
  "arguments_count" => 1
  "calls" => array:1 [
    0 => array:2 [
      0 => "setContainer"
      1 => {#1568
        +"type": "collection"
        +"value": array:1 [
          0 => {#1567
            +"type": "service"
            +"id": "service_container"
            +"invalidBehavior": 1
          }
        ]
      }
    ]
  ]
]

Instance =>

Drupal\Core\Cache\ChainedFastBackendFactory {#56
  #consistentServiceName: "cache.backend.database"
  #fastServiceName: "cache.backend.apcu"
  #container: Drupal\Core\DependencyInjection\Container {#40 …7}
}