PhpBrew\Machine::getInstance PHP Method

    public static function getInstance()
    {
        if (is_null(self::$instance)) {
            self::$instance = new self();
        }
        return self::$instance;
    }

 /**
  * @outputBuffering enabled
  * @depends testInstallCommand
  */
 public function testInstallAsCommand()
 {
     $processorNumber = Machine::getInstance()->detectProcessorNumber();
     $jobs = is_numeric($processorNumber) ? "--jobs {$processorNumber}" : "";
     $this->assertTrue($this->runCommand("phpbrew --quiet install {$jobs} {$this->primaryVersion} as myphp +soap"));
     $this->assertListContains("myphp");
 }