ore/Object/operator_equals.html">Object.==</a>.</p>
<p>Iterating over elements of a set may be either unordered
or ordered in some way. Examples:</p><ul><li>A <a href="dart-collection/HashSet-class.html">HashSet</a> is unordered, which means that its iteration order is
unspecified,</li><li><a href="dart-collection/LinkedHashSet-class.html">LinkedHashSet</a> iterates in the insertion order of its elements, and</li><li>a sorted set like <a href="dart-collection/SplayTreeSet-class.html">SplayTreeSet</a> iterat