func insert<C : RangeReplaceableCollectionType>(inout: C, newElement: C.Generator.Element, atIndex: C.Index) Insert newElement into x at index i. Invalidates all indices with respect to x. Complexity: O(count(x)). Declaration func insert<C : RangeReplaceableCollectionType>(inout x: C, newElement: C.Generator.Element, atIndex i: C.Index)