public static function envsDir()
    {
        if (!self::$envsDir) {
            return null;
        }
        return self::$dir . DIRECTORY_SEPARATOR . self::$envsDir . DIRECTORY_SEPARATOR;
    }
public static function envsDir()
    {
        if (!self::$envsDir) {
            return null;
        }
        return self::$dir . DIRECTORY_SEPARATOR . self::$envsDir . DIRECTORY_SEPARATOR;
    }
public static function envsDir ( ) { if ( ! self :: $ envsDir ) { return null ; } return self :: $ dir . DIRECTORY_SEPARATOR . self :: $ envsDir . DIRECTORY_SEPARATOR ; }
Return current path to `_envs` dir.
Use it to store environment specific configuration.

@return string
Return current path to _envs dir . Use it to store environment specific configuration .