docs: public void addExportedPackages(Set<String> packages) {
  		String s = (String) getMainAttributes().get(EXPORT_PACKAGE);
  		Wrapper<Boolean> modified = Wrapper.wrap(this.modified);
  		String result = mergeIntoCommaSeparatedList(s, packages, modified, lineDelimiter);
  		this.modified = modified.get();
  		getMainAttributes().put(EXPORT_PACKAGE, result);
  	}