src/Base/Configurator.php
public function useProtocol(string $protocolClass)
    {
        if (!is_subclass_of($protocolClass, AbstractProtocol::class)) {
            throw new ConfiguratorException('Unknown protocol class: ' . $protocolClass . '.');
        }
        if (!class_exists($protocolClass)) {
            throw new ConfiguratorException('The protocol class "' . $protocolClass . '" is not exists.');
        }
        $this->protocolClass = $protocolClass;
    }
public function useProtocol(string $protocolClass)
    {
        if (!is_subclass_of($protocolClass, AbstractProtocol::class)) {
            throw new ConfiguratorException('Unknown protocol class: ' . $protocolClass . '.');
        }
        if (!class_exists($protocolClass)) {
            throw new ConfiguratorException('The protocol class "' . $protocolClass . '" is not exists.');
        }
        $this->protocolClass = $protocolClass;
    }
@param string $protocolClass

@throws ConfiguratorException