docs: public static Matcher<BinaryTree> binaryTree(
        final Matcher<ExpressionTree> matcher1, final Matcher<ExpressionTree> matcher2) {
      return new Matcher<BinaryTree>() {
        @Override
        public boolean matches(BinaryTree t, VisitorState state) {
          return null != ASTHelpers.matchBinaryTree(t, Arrays.asList(matcher1, matcher2), state);
        }
      };
    }