function end_of_service() {
  if (needs_printing!="") {
    print class;
  }
  needs_printing="";
  class="";
}
BEGIN {FS=": "}
{
  if ($0 ~ /^  [^ ]/) {
    end_of_service();
  }
  if (index($0, search)) {
    needs_printing=$0;
  }
  if ($1 == "    class") {
    class=$2;
  }
}
END {
  end_of_service();
}