">NotEmptySet</a><span class="token operator">&lt;</span><span class="token keyword"></span><a href="to-not-empty-set.html">E</a><span class="token operator">&gt;</span><span class="token operator">&gt;</span></div><div class="brief "><p class="paragraph">Returns an encapsulated <a href="-not-empty-set/index.html">NotEmptySet</a> containing all the elements of this collection, or returns an encapsulated <a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-illegal-argument-exception/index.html">Ille