/**
  * Returns the only instance of this class
  * @return DAV_Multistatus
  */
 public static function inst()
 {
     if (null === self::$inst) {
         self::$inst = new DAV_Test_Multistatus();
     }
     return self::$inst;
 }
 /**
  * @depends testClose
  */
 public function testSecondClose()
 {
     // A second DAV_Multistatus::close() shouldn't do anything!
     $this->expectOutputString('');
     DAV_Test_Multistatus::inst()->close();
 }