src/Composer/Repository/Vcs/GitLabDriver.php
public function getChangeDate($identifier)
    {
        if ($this->gitDriver) {
            return $this->gitDriver->getChangeDate($identifier);
        }

        if (isset($this->commits[$identifier])) {
            return new \DateTime($this->commits[$identifier]['committed_date']);
        }

        return new \DateTime();
    }
public function getChangeDate($identifier)
    {
        if ($this->gitDriver) {
            return $this->gitDriver->getChangeDate($identifier);
        }

        if (isset($this->commits[$identifier])) {
            return new \DateTime($this->commits[$identifier]['committed_date']);
        }

        return new \DateTime();
    }
{@inheritdoc}