harness/api_checkers.go
func CheckExtract(val bool) APICheckOption {
	return func(s *APICheckSuite) {
		s.opts.CheckExtract = val
	}
}
func CheckExtract(val bool) APICheckOption {
	return func(s *APICheckSuite) {
		s.opts.CheckExtract = val
	}
}
// CheckExtract returns an option that sets whether to check if extracting contexts from carriers works.