irb(main):002:0> pp iseq.to_a
[”YARVInstructionSequence/SimpleDataFormat”,
1, 2, 1,
{arg_size: 0, local_size: 1, stack_max: 2},
””, ””, nil, 1, :top,
[], 0, [],
[1,
[:trace, 1],
[:putself],
[:send, :a, 0, nil, 24, 0],
[:putself],
[:send, :b, 0, nil, 24, 1],
[:opt_plus, 3],
[:leave]]]