public function getCommandClass($commandID)
    {
        $commandID = strtoupper($commandID);

        if (isset($this->commands[$commandID]) || array_key_exists($commandID, $this->commands)) {
            $commandClass = $this->commands[$commandID];
        } elseif (class_exists($commandClass = "Predis\Command\Redis\\$commandID")) {
            $this->commands[$commandID] = $commandClass;
        } else {
            return;
        }

        return $commandClass;
    }
public function getCommandClass($commandID)
    {
        $commandID = strtoupper($commandID);

        if (isset($this->commands[$commandID]) || array_key_exists($commandID, $this->commands)) {
            $commandClass = $this->commands[$commandID];
        } elseif (class_exists($commandClass = "Predis\Command\Redis\\$commandID")) {
            $this->commands[$commandID] = $commandClass;
        } else {
            return;
        }

        return $commandClass;
    }
{@inheritdoc}