/**
 * Echo the ID of the current message in the thread.
 *
 * @since 1.9.0
 */
function bp_the_thread_message_id()
{
    echo (int) bp_get_the_thread_message_id();
}
/**
 * Add CSS class for the current message depending on starred status.
 *
 * @since 2.3.0
 *
 * @param  array $retval Current CSS classes.
 * @return array
 */
function bp_messages_star_message_css_class($retval = array())
{
    if (true === bp_messages_is_message_starred(bp_get_the_thread_message_id())) {
        $status = 'starred';
    } else {
        $status = 'not-starred';
    }
    // Add css class based on star status for the current message.
    $retval[] = "message-{$status}";
    return $retval;
}