lass="literal"><span class="pre">1</span></tt>&lt;p,<a href="./placeholders.html" class="identifier">_2</a>&gt;
        , <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">2</span></tt>&lt;op,<a href="./placeholders.html" class="identifier">_1</a>,<a href="./placeholders.html" class="identifier">_2</a>&gt;
        , <a href="./identity.html" class="identifier">identity</a>&lt;<a href="./placeholders.html" class="identifier">_1</a>&gt;
        &gt;
    &gt;::t