function initializer()
    {
        if ($this->initializer)
            return $this->initializer;

        // ..

        $initializer = new InitializerAggregate($this);

        # attach defaults:
        $initializer->addCallable(function($instance, $self) {
            if ($instance instanceof iServicesAware)
                // Inject Service Container Inside
                $instance->setServices($self);
        }, 10000);

        return $this->initializer = $initializer;
    }