This createTerra method is declared but never used. You should remove it.
* Creates a Terra instance.
*
* @return Terra
* A configured Flo instance.
*/
private function createTerra()
{
$terra = new Terra();
// Get config from env variables or files.
if ($config_env = getenv('TERRA')) {
$config_env = Yaml::parse($config_env);
in src/terra/Factory.php, line 20