// E03-S05: instance size and field offsets. A class starts with its
// two-byte descriptor pointer; fields follow in declaration order with no
// padding. boolean/byte/char are 1 byte, integer/word/class reference 2,
// interface reference 4, and an array is element size times length.
box size 35
box.b offset 2
box.ok offset 3
box.c offset 4
box.w offset 5
box.i offset 7
box.nums offset 9
box.flags offset 15
box.s offset 17
box.next offset 21
box.many offset 23
box.kids offset 31
empty size 2