/a>&lt;O,&#8203;A extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/CharSequence.html?is-external=true" title="class or interface in java.lang" class="externalLink">CharSequence</a>&gt;</th>
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<div class="block">Asserts than a <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/CharSequence.html?is-external=true" title="class or interface in java.lang" class="externalLink"><code>CharSequence</code></a>-based attribute is contained in a given <a href="http://docs.