openfed-8.x-8.5/modules/openfed_features/openfed_federalheader/openfed_federalheader.module

<?php

/**
 * Implements hook_theme().
 */
function openfed_federalheader_theme($existing, $type, $theme, $path) {
  return [
    'federalheader_block' => [
      'variables' => ['module_path' => NULL, 'other_information' => NULL]
    ],
  ];
}