This method is defined only if at least one of the allocators defines
it. The good allocation size is obtained from SmallAllocator if s <= threshold, or LargeAllocator otherwise. (If one of the
allocators does not define goodAllocSize, the default
implementation in this module applies.)
This method is defined only if at least one of the allocators defines it. The good allocation size is obtained from SmallAllocator if s <= threshold, or LargeAllocator otherwise. (If one of the allocators does not define goodAllocSize, the default implementation in this module applies.)