docs: public static <T extends Tree> Matcher<T> isTransient() {
      return new Matcher<T>() {
        @Override
        public boolean matches(Tree tree, VisitorState state) {
          Symbol sym = ASTHelpers.getSymbol(tree);
          // NOTE(yorick): there is no isTransient() on Symbol. This is what it would be.
          return sym.getModifiers().contains(Modifier.TRANSIENT);
        }
      };
    }