drush_plugin__composer_check/ComposerCheck/RequirementsLoader.php

<?php

namespace Fgm\ComposerCheck;


class RequirementsLoader implements LoaderInterface {

  public function __construct(string $directory) {
    $this->file = realpath("${directory}/composer.json");
  }

  public function load() {
    $json = json_decode(file_get_contents($jsonPath), TRUE);
    $jsonPackages = $json['require'] ?? [];
    $jsonDevPackages = $json['require-dev'] ?? [];
  }
}