docs: public static Matcher<ExpressionTree> ignoreParens(final Matcher<ExpressionTree> innerMatcher) {
      return new Matcher<ExpressionTree>() {
        @Override
        public boolean matches(ExpressionTree expressionTree, VisitorState state) {
          return innerMatcher.matches((ExpressionTree) stripParentheses(expressionTree), state);
        }
      };
    }