drush_plugin__composer_check/ComposerCheck/JsonReporter.php

<?php

namespace Fgm\ComposerCheck;

/**
 * Class YamlReporter formats a requirements set as YAML.
 */
class JsonReporter extends ReporterBase {

  /**
   * {@inheritdoc}
   */
  public function report(MergeBox $mergeBox) : string {
    $json = json_encode($mergeBox->getRows(), JSON_PRETTY_PRINT);
    return $json;
  }

}