public function deleteAll()
	{
	    if (!$this->namespace) {
	        return $this->clear();
        }

		$namespaceCacheKey = $this->getNamespaceCacheKey();
		$namespaceVersion = $this->getNamespaceVersion() + 1;

		if ($this->doSet($namespaceCacheKey, [true, $namespaceVersion, [], 0])) {
			$this->namespaceVersion = $namespaceVersion;

			return true;
		}

		return false;
	}