private function parseEnvironmentLine($environmentLine)
    {
        $variables     = array();@
        $variableLines = explode(' ', $environmentLine ?: '');

        foreach ($variableLines as $variableLine) {
            if (!empty($variableLine)) {
                list($key, $value) = $this->parseEnvironementVariable($variableLine);
                $variables[$key]   = $value;
            }
        }

        return $variables;
    }