PHP7 NetBeans Dev 201606080002で何故かエラー表示される

netbeans-error.php

<?php
class StaticClass
{
    public static function sRun()
    {
        echo 'static run!!';
    }
}
class useClass
{
    public static $StaticC = StaticClass::class;

    public static function uRun()
    {
        echo 'use run!!';
        self::$StaticC::sRun(); // error???
    }
}
$uRun = useClass::uRun();