create, use, and destroy such resources
entirely within the scope of the future code block.</p>
</div>
<div id="mutation" class="section level3">
<h3>Mutation</h3>
<p>Reference class objects (including R6 objects and data.table objects)
and environments are among the few “native” R object types that are
mutable, that is, can be modified in-place. Unless they contain native
resources (see previous section), there’s nothing wrong with using
mutable objects from within future code blocks, even objects cr