o_CopyTupleFromToCanDestroy

open override fun o_CopyTupleFromToCanDestroy(    self: AvailObject,     start: Int,     end: Int,     canDestroy: Boolean): A_Tuple

Make a tuple that only contains the given range of elements of the given tuple. While it would be easy to always produce another subrange tuple, this isn't a good idea. Let the specific kind of flat tuple that is our basis decide what the cutoff size is.