9;a3 -&gt; Effect&lt;&#39;a4,&#39;a3,&#39;a5&gt;
  static member ap: applicative: Effect&lt;&#39;r,(&#39;b -&gt; &#39;a),&#39;e&gt; -&gt; e: Effect&lt;&#39;r,&#39;b,&#39;e&gt; -&gt; Effect&lt;&#39;r,&#39;a,&#39;e&gt;<br /><em>&lt;summary&gt;
 Describes an effect that can either succeed with &lt;typeparamref name=&quot;&#39;r&quot; /&gt;, or fails with &lt;typeparamref name=&quot;&#39;e&quot; /&gt;.
 The effect is is &#39;cold&#39;, and only starts when run with an &lt;typeparamref name=&quot;&#39;r&quot; /&