在父构造函数中访问子命名空间

Question

I have child class in different namespace than it's parent abstract class in child class construct method looks like this:

namespace someNameSpace;

class childClass extends \parentClass

    function __construct()
        {
            parent::__construct();
        }

in parent class constructor I should call another class method in child namespace. Something like this:

abstract class parentClass

function __construct()
{
    somenameSpace\anotherChildClass::method();
}

the problem: I can't just write somenameSpace\anotherChildClass because I have many child classes each in different namespace, and namespace should be dynamic.

If I write just anotherChildClass::method(); I got class not found error because it executed in parent namespace. How could I solve this?