call __invoke() of a class member

call_invoke_method_of_a_class_member.php

<?php

class A
{

    /**
     *
     * @var \SomeNamespace\SomeMember 
     */
    private $someMember;

    /**
     * PHP Fatal error:  Call to undefined method
     * @return type
     */
    public function doesNotWork()
    {
        return $this->someMember();
    }
    
    public function foo()
    {
        $tmp = $this->someMember;
        return $tmp();
    }

    public function bar()
    {
        return call_user_func($this->someMember);
    }

    public function shit()
    {
        return $this->someMember->__invoke();
    }

}