Ko\ProcessManager::hasAlive PHP Method

    public function hasAlive()
    {
        return count($this->children) > 0;
    }

 public function testHasNoAliveAfterWait()
 {
     $this->manager->fork(function () {
         usleep(5000);
     });
     $this->manager->wait();
     $this->assertFalse($this->manager->hasAlive());
 }