Changing the default loading icon for editing comments for general users in Simple Comment Editing WordPress Plugin

functions.php

<?php
/**
  * Changing the default loading icon for editing comments for general users
  * @plugin_name: Simple Comment Editing
  * @plugin_uri: https://wordpress.org/plugins/simple-comment-editing/
  */
add_filter( 'sce_loading_img', function( $default_url ) {
  return get_stylesheet_directory_uri() . '/assets/images/spinner.gif';
} );