Namespace version
string $namespaceVersion
private function getNamespaceVersion() {
if (null !== $this->namespaceVersion) {
return $this->namespaceVersion;
}
$namespaceCacheKey = $this
->getNamespaceCacheKey();
$namespaceVersion = $this
->doFetch($namespaceCacheKey);
if (false === $namespaceVersion) {
$namespaceVersion = 1;
$this
->doSave($namespaceCacheKey, $namespaceVersion);
}
$this->namespaceVersion = $namespaceVersion;
return $this->namespaceVersion;
}