A call to SegmentAllocator::allocateArray, such as:

    allocator.allocateArray(JAVA_LONG, 10);

Is somewhat ambiguous. It is not clear whether this should create an uninitialized long array with 10 elements, or a long array with a single element initialized to '10'.

i.e. either of the following overloads of allocateArray is applicable:

    default MemorySegment allocateArray(MemoryLayout elementLayout, long count)
    default MemorySegment allocateArray(ValueLayout.OfLong elementLayout, long... elements)

Overload resolution picks the former.

We could rename one of these methods to disambiguate a use case such as this.