Braintree\Configuration::getEnvironment PHP Method

    public function getEnvironment()
    {
        return $this->_environment;
    }

 public function testDetectEnvironmentFromClientId()
 {
     $config = new Braintree\Configuration(['clientId' => 'client_id$development$integration_client_id', 'clientSecret' => 'client_secret$development$integration_client_secret']);
     $this->assertEquals('development', $config->getEnvironment());
 }