static <A> TailFile watchStructureLog_future(File f, final VF1<A> onLine) {
  ret watchStructureLog_future(f, tailFileDefaultInterval(), onLine);
}

static <A> TailFile watchStructureLog_future(File f, int interval, final VF1<A> onLine) {
  ret watchQuotedLog_future(f, interval, voidfunc(S s) {
    callF(onLine, unstructure(s))
  });
}

static <A> TailFile watchStructureLog_future(int interval, File f, final VF1<A> onLine) {
  ret watchStructureLog_future(f, interval, onLine);
}