// enumerate stack frames from the current location, skipping the initial
// number of them (this can be useful when Walk() is called from some known
// location and you don't want to see the first few frames anyhow; also
// enumerate stack frames from the current location, skipping the initial
// number of them (this can be useful when Walk() is called from some known
// location and you don't want to see the first few frames anyhow; also