Description:
------------
abstract methods should be implemented by child class and should not be static but when the implementation comes from a trait it cloud be static and code continue running without any problem. 

Test script:
---------------
<?php

abstract class A
{
    abstract public function createApp();
}

class B extends A
{
    use C;
}

trait C
{
    public static function createApp()
    {
        echo "You should not be here";
    }
}

B::createApp();

Expected result:
----------------
Error for not implementing abstract method