code: public AnnotationTypeElementDoc[] elements() {
          List<AnnotationTypeElementDoc> elements = List.nil();
          for (Symbol sym : tsym.members().getSymbols(NON_RECURSIVE)) {
              if (sym != null && sym.kind == MTH) {
                  MethodSymbol s = (MethodSymbol)sym;
                  elements = elements.prepend(env.getAnnotationTypeElementDoc(s));
              }
          }
          return
              elements.toArray(new AnnotationTypeElementDoc[elements.length()]);
      }
docs: Returns the elements of this annotation type.
  Returns an empty array if there are none.
  Elements are always public, so no need to filter them.