><a href="use-toggle-either.html">R</a><span class="token operator">?</span><span class="token operator"> = </span>null</span></span><span class="token punctuation">)</span><span class="token operator">: </span><a href="https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-pair/index.html">Pair</a><span class="token operator">&lt;</span><span data-unresolved-link="arrow.core/Either///PointingToDeclaration/">Either</span><span class="token operator">&lt;</span><a href="use-toggle-either.html">L</a><span clas