tKey" id="io.github.fluent4s.ast.BlockExpression.FVariantKey" class="extype">FVariantKey</a> with <span name="scala.Product" class="extype">Product</span> with <span name="scala.Serializable" class="extype">Serializable</span></span></span></h4><div id="comment" class="fullcommenttop"><div class="comment cmt"><p>A number key of a <a href="BlockExpression$FVariant.html" name="io.github.fluent4s.ast.BlockExpression.FVariant" id="io.github.fluent4s.ast.BlockExpression.FVariant" class="extype">FVariant</a>.</p>