render_placeholder_generator:
class: DrupalCoreRenderPlaceholderGenerator
arguments: ['%renderer.config%']
===============
$this->rendererConfig = $renderer_config;
// kint($this->rendererConfig);
// //$args array(1)
// →array(2)
// →'required_cache_contexts' => array(3)
// string(28) "languages:language_interface"
// string(5) "theme"
// string(16) "user.permissions"
// →'auto_placeholder_conditions' => array(3)
// 'max-age' => integer0
// →'contexts' => array(2)
// string(7) "session"
// string(4) "user"
// 'tags' => array(0)