code: public Log skip(long entries) {
      assertIsOpen();
      Segment segment = segments.currentSegment();
      segment.skip(entries);
      return this;
    }
docs: Skips the given number of entries.
  <p>
  This method essentially advances the log's {@link Log#lastIndex()} without writing any entries at the interim
  indices. Note that calling {@code Loggable#truncate()} after {@code skip()} will result in the skipped entries
  being partially or completely reverted.
  
  @param entries The number of entries to skip.
  @return The log.
  @throws IllegalStateException If the log is not open.
  @throws IllegalArgumentException If the number of entries is less than {@code 1}
  @throws IndexOutOfBoundsException If skipping the given number of entries places the index out of the bounds of the
  log.