ols.types.collection/-not-empty-set/index.html">NotEmptySet</a> containing all the elements of this collection, or throws an <a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-illegal-argument-exception/index.html">IllegalArgumentException</a> if this collection is <a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-collection/is-empty.html">empty</a>.</p></div></div></div>
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