boolean addToPlateUnique(Address address, String comment) {
		if (StringUtils.isBlank(comment)) {
			return false;
		}
		String plate = program.getListing().getComment(CommentType.PLATE, address);
		if (plate == null) {
			plate = "";
		}
		else if (plate.contains(comment)) {
			return true;
		}
		else if (!comment.endsWith("\n")) {
			comment += '\n';
		}
		plate = comment + plate; // putting new comment at top of existing plate
		SetCommentCmd.createComment(program, address, plate, CommentType.PLATE);
		return true;
	}
Processing non-public, non-global symbols.  User should not then call
{@link #processAllSymbols()}; but has these other methods available to supplement this one:
{@link #processGlobalSymbolsNoTypedefs()} and (@link #processPublicSymbols()}
@throws CancelledException upon user cancellation
@throws PdbException upon issue processing the request
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/DefaultPdbApplicator.java