code: List<JCExpression> annotationFieldValues() {
          accept(LPAREN);
          ListBuffer<JCExpression> buf = new ListBuffer<JCExpression>();
          if (token.kind != RPAREN) {
              buf.append(annotationFieldValue());
              while (token.kind == COMMA) {
                  nextToken();
                  buf.append(annotationFieldValue());
              }
          }
          accept(RPAREN);
          return buf.toList();
      }
docs: AnnotationFieldValues   = "(" [ AnnotationFieldValue { "," AnnotationFieldValue } ] ")"