inside an environment.</li>
<li>A pointer to that environment is stored inside the R6-class as well
as the obj_tracker</li>
<li>This way, the R6-class is not referenced directly by the
obj_tracker, however it is possible, by accessing the environment the ID
is</li>
<li>wrapped in through the object tracker to set the ID that is stored
inside it to NA - thereby invalidating it.</li>
<li>As the R6-class is only storing a pointer to the environment, for it
the ID will now also appear as NA.</li>
</ul>
<p>As me