<span class="hljs-keyword">type</span> <span class="hljs-title class_">A</span>: Trait;
<span class="hljs-keyword">type</span> <span class="hljs-title class_">A</span>;
<span class="hljs-keyword">type</span> <span class="hljs-title class_">A</span> = B;
<span class="hljs-keyword">type</span> <span class="hljs-title class_">R</span>&lt;T&gt; = m::R&lt;T, ConcreteError&gt;