private String getNewSymbolTypesLog() {
		StringBuilder builder = new StringBuilder();
		DelimiterState ds = new DelimiterState("New Symbol IDs Seen: ", ",");
		/*
		 * Sort these before printing to avoid sorting performance hit when logging is not used.
		 */
		Set<Integer> sortedSet = new TreeSet<>(newSymbolTypes);
		for (Integer val : sortedSet) {
			builder.append(ds.out(true, String.format("0X%04X", val)));
		}
		return builder.toString();
	}
Returns a list of Symbol IDs that we have not seen in real data while testing.
@return {@link String} of pretty output message.
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/PdbReaderMetrics.java