o First step in put/get field processing search for ciField corresponding to field index.
o For scalarized multifield ci model returns first field of multifield bundle, from correctness standpoint compiler must update all the fields of the multifield bundle.
o The runtime uses a per class representation with fields sorted by field index, which facilitates operations like class file reconstruction or validation of class redefinition. The JIT compilers use a per instance representation with fields sorted by offset.