* commit 'c5b11fcc1f4fc4fba988218d0a99a19690398a56': Create FieldPacker.getPos() to get the actual amount of data used for FP.
* commit 'c5b11fcc1f4fc4fba988218d0a99a19690398a56': Create FieldPacker.getPos() to get the actual amount of data used for FP.