title: How to delete an instance of a class?
body: <p>So, I have this project that creates multiple instances of a class, and list them.</p>
  
  <p>At some point, the instanced class is not needed anymore. How can I flush it ?</p>
  
  <p>So far, it doesn't happen, even when the class has nothing to do anymore (if it had been a single static class, the program would have shut down), it's still in my list, and its public variables are still available ...</p>