code: public static FileLastModifiedFilter outside(LocalDateTime onBefore, LocalDateTime onAfter) {
      return outside(onBefore.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli(),
        onAfter.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
    }
docs: Factory method to create an instance of the {@link FileLastModifiedFilter} that evaluates and filters {@link File}s
  based on whether they were last modified before or after a given span of time.
  
  @param onBefore {@link LocalDateTime} used to filter {@link File}'s that were last modified
  on or before this date/time.
  @param onAfter {@link LocalDateTime} used to filter {@link File}'s that were last modified
  on or after this date/time.
  @return an instance of the {@link FileLastModifiedFilter}.
  @see java.time.LocalDateTime
  @see #outside(long, long)