ss="brief "><p class="paragraph">Creates a not empty set starting with a <span data-unresolved-link="kotools.types.collections/NotEmptySet/&amp;lt;init&amp;gt;/#TypeParam(bounds=[kotlin.Any?])#kotlin.Array[TypeParam(bounds=[kotlin.Any?])]/PointingToCallableParameters(0)/">head</span> and containing all the elements of the optional <span data-unresolved-link="kotools.types.collections/NotEmptySet/&amp;lt;init&amp;gt;/#TypeParam(bounds=[kotlin.Any?])#kotlin.Array[TypeParam(bounds=[kotlin.Any?])]/PointingToCal