//.add_property("alphabet",
// make_getter(&SeqSpan::get_alphabet,
// return_value_policy<copy_const_reference>()))
+ .add_property("annotations", &SeqSpan::annotations,
+ &SeqSpan::setAnnotations)
.add_property("start", &SeqSpan::start, &SeqSpan::setStart,
"start position relative to root sequence")
.add_property("stop", &SeqSpan::stop, &SeqSpan::setStop,