AvailableTestDumper.php

<?php

namespace Drupal\devel_dumper_test\Plugin\Devel\Dumper;

use Drupal\devel\DevelDumperBase;

/**
 * Provides a AvailableTestDumper plugin.
 *
 * @DevelDumper(
 *   id = "available_test_dumper",
 *   label = @Translation("Available test dumper."),
 *   description = @Translation("Drupal dumper for testing purposes (available).")
 * )
 */
class AvailableTestDumper extends DevelDumperBase {
    
    /**
     * {@inheritdoc}
     */
    public function dump($input, $name = NULL) {
        // Add a predetermined string to $input to check if this dumper has been
        // selected successfully.
        $input = '<pre>' . 'AvailableTestDumper::dump() ' . $input . '</pre>';
        echo $input;
    }
    
    /**
     * {@inheritdoc}
     */
    public function export($input, $name = NULL) {
        // Add a predetermined string to $input to check if this dumper has been
        // selected successfully.
        $input = '<pre>' . 'AvailableTestDumper::export() ' . $input . '</pre>';
        return $this->setSafeMarkup($input);
    }
    
    /**
     * {@inheritdoc}
     */
    public function exportAsRenderable($input, $name = NULL) {
        // Add a predetermined string to $input to check if this dumper has been
        // selected successfully.
        $input = '<pre>' . 'AvailableTestDumper::exportAsRenderable() ' . $input . '</pre>';
        return [
            '#attached' => [
                'library' => [
                    'devel_dumper_test/devel_dumper_test',
                ],
            ],
            '#markup' => $this->setSafeMarkup($input),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public static function checkRequirements() {
        return TRUE;
    }

}