data"]]</code> and
<code>x[["processingLog"]]</code> return those slots.</p></li>
<li><p>If <code>i</code> is a string ending in the <code>"Unit"</code>, then the characters preceding
that string are taken to be the name of an item in the data object, and a
list containing the unit is returned (or <code>NULL</code> if there is no such unit).
This list consists of an item named <code>unit</code>, which is an <code><a href="https://rdrr.io/r/base/expression.html" class="external-link">expression()</a></code>,