 a version that does not throw, see <a href="../types/rbobjectaccess1.html?swift#failable"><code>failable</code></a>.</p>
<p>(This method is present in this class meaning you can call it on any
<a href="../types/rbobject13.html?swift"><code>RbObject</code></a> as well as <a href="../types/rbgateway1.html?swift"><code>RbGateway</code></a> without any difference in effect.  This is
purely convenience to put all these getter/setter pairs in the same place and
make construction of <a href="../types/rbfailableac