DeprecatedServicePropertyTrait.php

<?php

namespace Drupal\Core\DependencyInjection;


/**
 * Provides a standard way to announce deprecated properties.
 */
trait DeprecatedServicePropertyTrait {
    
    /**
     * Allows to access deprecated/removed properties.
     *
     * This method must be public.
     */
    public function __get($name) {
        if (!isset($this->deprecatedProperties)) {
            throw new \LogicException('The deprecatedProperties property must be defined to use this trait.');
        }
        if (isset($this->deprecatedProperties[$name])) {
            $service_name = $this->deprecatedProperties[$name];
            $class_name = static::class;
            @trigger_error("The property {$name} ({$service_name} service) is deprecated in {$class_name} and will be removed before Drupal 10.0.0.", E_USER_DEPRECATED);
            return \Drupal::service($service_name);
        }
    }

}