private String getEolComment(CodeUnit codeUnit) {
		String comment = codeUnit.getComment(CommentType.EOL);
		if (comment == null) {
			return "";
		}
		return comment.replace('\n', ' ');
	}
Returns a ComboBoxModel populated with a sorted unique list
of all currently defined Bookmark categories.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/bookmark/CreateBookmarkDialog.java