code: public static String stringToDocComment(String doc) {
      boolean emptyDoc = (doc == null || doc.trim().isEmpty());
      if (emptyDoc) return "";
  
      return DocEscaping.stringToDocComment(doc, DocCommentStyle.NO_MARGIN);
    }
docs: Returns a doc comment, as a string of Swift source, for the given documentation string.
  
  @param doc provides the javadoc for the symbol, if any.  May be null.
  @return an escaped doc comment string.