Grav-Admin-Plugin/vendor/composer/autoload_psr4.php

<?php

// autoload_psr4.php @generated by Composer

$vendorDir = dirname(__DIR__);
$baseDir = dirname($vendorDir);

return array(
    'ScssPhp\\ScssPhp\\' => array($vendorDir . '/scssphp/scssphp/src'),
    'Laminas\\Xml\\' => array($vendorDir . '/laminas/laminas-xml/src'),
    'Grav\\Plugin\\Admin\\' => array($baseDir . '/classes/plugin'),
);