public function setMultiple($values, $ttl = null)
	{
		[$ttl, $expireTime] = $this->ttl($ttl);

		$namespacedValues = [];
		foreach ($values as $key => $value) {
			$this->validateKey($key);
			$this->namespace && $this->prefixValue($key);

			$namespacedValues[$key] = [true, $value, [], $expireTime];
		}

		return $this->doSetMultiple($namespacedValues, $ttl);
	}