sunrise.php

<?php
$sunrises = array(
    "wpml_sunrise" => dirname( __FILE__ ) .  "/plugins/sitepress-multilingual-cms/tools/inc/sunrise.php",
    "dm_sunrise" => dirname( __FILE__ ) .  "/plugins/wordpress-mu-domain-mapping/sunrise.php"
);

foreach ( $sunrises as $sunrise ) {
    if ( file_exists( $sunrise ) ) {
        include $sunrise;
    }
}