code: public static FileLastModifiedFilter during(Date dateTimeBegin, Date dateTimeEnd) {
      return during(dateTimeBegin.getTime(), dateTimeEnd.getTime());
    }
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 between a given span of time.
  
  @param dateTimeBegin {@link Date} used to filter {@link File}'s that were last modified on or after this date/time.
  @param dateTimeEnd {@link Date} used to filter {@link File}'s that were last modified on or before this date/time.
  @return an instance of the {@link FileLastModifiedFilter}.
  @see java.util.Date#getTime()
  @see #during(long, long)