protected function parseNamespaceDeclaration($namespaceDeclaration)
{
$result = preg_match(self::SPLIT_PATTERN_NAMESPACEDECLARATION, $namespaceDeclaration, $matches);
if ($result !== 1 || !(isset($matches['alias']) && isset($matches['packageKey']))) {
throw new Fusion\Exception('Invalid namespace declaration "' . $namespaceDeclaration . '"', 1180547190);
}
$namespaceAlias = $matches['alias'];
$namespacePackageKey = $matches['packageKey'];
$this->objectTypeNamespaces[$namespaceAlias] = $namespacePackageKey;
}