Service placeholder_strategy detail

Computed Definition =>

array:4 [
  "class" => "Drupal\Core\Render\Placeholder\ChainedPlaceholderStrategy"
  "arguments_count" => 0
  "calls" => array:1 [
    0 => array:2 [
      0 => "addPlaceholderStrategy"
      1 => {#1573
        +"type": "collection"
        +"value": array:1 [
          0 => {#1569
            +"type": "service"
            +"id": "placeholder_strategy.single_flush"
            +"invalidBehavior": 1
          }
        ]
      }
    ]
  ]
  "alias" => "Drupal\Core\Render\Placeholder\PlaceholderStrategyInterface"
]

Instance =>

Drupal\Core\Render\Placeholder\ChainedPlaceholderStrategy {#1567
  #placeholderStrategies: array:1 [
    0 => Drupal\Core\Render\Placeholder\SingleFlushStrategy {#1571}
  ]
}