public function setObjectTypeNamespace($alias, $namespace)
    {
        if (!is_string($alias)) {
            throw new Fusion\Exception('The alias of a namespace must be valid string!', 1180600696);
        }
        if (!is_string($namespace)) {
            throw new Fusion\Exception('The namespace must be of type string!', 1180600697);
        }
        $this->objectTypeNamespaces[$alias] = $namespace;
    }