toNotEmptyMutableSet
@SinceKotoolsTypes(version = "1.3")
Returns a not empty mutable set containing all the elements of this array, or throws an IllegalArgumentException if this array is empty.
@SinceKotoolsTypes(version = "1.3")
Returns a not empty mutable set containing all the elements of this collection, or throws an IllegalArgumentException if this collection is empty.