final public function getServices()
    {
        if (is_null($this->serviceProviders)) {
            $this->serviceProviders = $this->getServiceProviders();
        }

        return $this->serviceProviders;
    }
final public function getServices()
    {
        if (is_null($this->serviceProviders)) {
            $this->serviceProviders = $this->getServiceProviders();
        }

        return $this->serviceProviders;
    }
final public function getServices ( ) { if ( is_null ( $ this -> serviceProviders ) ) { $ this -> serviceProviders = $ this -> getServiceProviders ( ) ; } return $ this -> serviceProviders ; }
Returns all registered service providers

@return array
Returns all registered service providers