DiscoveryCachedTrait.php

<?php

namespace Drupal\Component\Plugin\Discovery;

trait DiscoveryCachedTrait {
    use DiscoveryTrait;
    
    /**
     * Cached definitions array.
     *
     * @var array
     */
    protected $definitions;
    
    /**
     * {@inheritdoc}
     */
    public function getDefinition($plugin_id, $exception_on_invalid = TRUE) {
        // Fetch definitions if they're not loaded yet.
        if (!isset($this->definitions)) {
            $this->getDefinitions();
        }
        return $this->doGetDefinition($this->definitions, $plugin_id, $exception_on_invalid);
    }

}