>dplyr::vars()</a></code> objects, as in <code><a href="https://dplyr.tidyverse.org/reference/select_all.html" class="external-link">dplyr::select_at()</a></code>. Alternatively, variables can be fed to these functions as in <code><a href="https://dplyr.tidyverse.org/reference/select.html" class="external-link">dplyr::select()</a></code>, to be collected by <code>rlang::quos(...)</code> and used as axis variables. If <code>axes</code> is not <code>NULL</code>, then such additional arguments are ignored.</li