public static void appendDescription(DataTypeComponent dtc, String description, String sep) {
		if (description == null || description.isEmpty()) {
			return;
		}
		String prev = dtc.getComment();
		if (prev == null) {
			prev = "";
		}
		if (!prev.isEmpty()) {
			prev += sep;
		}
		dtc.setComment(prev + description);
	}
Append a string to a description of a field in a structure.

@param dtc the {@link DataTypeComponent field} in a struct
@param description string to append, if null or empty nothing happens.
@param sep characters to place after previous description to separate it from the
new portion.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/dwarf/DWARFUtil.java