code: private void processIgnoredLeadingTokens(ParseTreeNode node, int position, int line, MemoEntry progress)
  	    throws TreeException, ParserException {
  	if (ignoredLeading) {
  	    processIgnoredTokens(node, position, line, progress);
  	}
      }
docs: This method processes leading tokens which are either hidden or ignored. The
  processing only happens if the configuration allows it.
  
  @param node
  @param position
  @param id
  @param line
  @param progress
  @throws TreeException
  @throws ParserException