<p>Utility functions for keyed objects which are implemented with class
<code>keyed_df</code>. Keyed object should be a data frame which inherits from
<code>keyed_df</code> and contains a data frame of <a href="keys-set.html">keys</a> in attribute 'keys'.</p>
    </div>

    <div id="ref-usage">
    <div class="sourceCode"><pre><code class = "r"><code>is_keyed_df(.tbl)

is.keyed_df(.tbl)

# S3 method for keyed_df
print(x, ...)

# S3 method for keyed_df
[(x, i, j, ...)</code></code></pre></div>
    </div>

 