public function setAuthentication($repositoryName, $username, $password = null)
    {
        $this->authentications[$repositoryName] = array('username' => $username, 'password' => $password);
    }
public function setAuthentication($repositoryName, $username, $password = null)
    {
        $this->authentications[$repositoryName] = array('username' => $username, 'password' => $password);
    }
{@inheritDoc}